diff --git a/backend/dojo_examples/combat_game/src/helpers/Experience_utils.cairo b/backend/dojo_examples/combat_game/src/helpers/Experience_utils.cairo
new file mode 100644
index 0000000..4cdc549
--- /dev/null
+++ b/backend/dojo_examples/combat_game/src/helpers/Experience_utils.cairo
@@ -0,0 +1,159 @@
+use core::traits::Into;
+
+#[generate_trait]
+pub impl ExperienceCalculator of ExperienceCalculatorTrait {
+    
+    fn calculate_exp_needed_for_level(level: u8) -> u16 {
+        let level_u16: u16 = level.into();
+        level_u16 * level_u16 * 10
+    }
+    
+    fn should_level_up(current_level: u8, current_exp: u16) -> bool {
+        let exp_needed = Self::calculate_exp_needed_for_level(current_level);
+        current_exp >= exp_needed
+    }
+    
+    fn remaining_exp_after_level_up(current_level: u8, current_exp: u16) -> u16 {
+        let exp_needed = Self::calculate_exp_needed_for_level(current_level);
+        if current_exp >= exp_needed {
+            current_exp - exp_needed
+        } else {
+            current_exp
+        }
+    }
+}
+
+#[cfg(test)]
+mod experience_calculator_tests {
+    use super::{ExperienceCalculator};
+
+    #[test]
+    #[available_gas(1000000)]
+    fn test_calculate_exp_needed_for_level() {
+        // Test values for different levels to verify the formula level² × 10
+        
+        // Level 1: 1² × 10 = 10
+        let exp_level_1 = ExperienceCalculator::calculate_exp_needed_for_level(1);
+        assert(exp_level_1 == 10, 'Level 1 should need 10 exp');
+        
+        // Level 2: 2² × 10 = 40
+        let exp_level_2 = ExperienceCalculator::calculate_exp_needed_for_level(2);
+        assert(exp_level_2 == 40, 'Level 2 should need 40 exp');
+        
+        // Level 5: 5² × 10 = 250
+        let exp_level_5 = ExperienceCalculator::calculate_exp_needed_for_level(5);
+        assert(exp_level_5 == 250, 'Level 5 should need 250 exp');
+        
+        // Level 10: 10² × 10 = 1000
+        let exp_level_10 = ExperienceCalculator::calculate_exp_needed_for_level(10);
+        assert(exp_level_10 == 1000, 'Level 10 should need 1000 exp');
+        
+        // Level 20: 20² × 10 = 4000
+        let exp_level_20 = ExperienceCalculator::calculate_exp_needed_for_level(20);
+        assert(exp_level_20 == 4000, 'Level 20 should need 4000 exp');
+    }
+    
+    #[test]
+    #[available_gas(1000000)]
+    fn test_should_level_up() {
+        // Level 1 (needs 10 exp)
+        
+        // 9 exp: should not level up
+        let should_level_up_1_9 = ExperienceCalculator::should_level_up(1, 9);
+        assert(!should_level_up_1_9, 'Level 1 with 9 exp not level up');
+        
+        // 10 exp: should level up
+        let should_level_up_1_10 = ExperienceCalculator::should_level_up(1, 10);
+        assert(should_level_up_1_10, 'Level 1 with 10 exp level up');
+        
+        // 15 exp: should level up
+        let should_level_up_1_15 = ExperienceCalculator::should_level_up(1, 15);
+        assert(should_level_up_1_15, 'Level 1 with 15 exp level up');
+        
+        // Level 5 (needs 250 exp)
+        
+        // 249 exp: should not level up
+        let should_level_up_5_249 = ExperienceCalculator::should_level_up(5, 249);
+        assert(!should_level_up_5_249, 'Level 5 249 exp not level up');
+        
+        // 250 exp: should level up
+        let should_level_up_5_250 = ExperienceCalculator::should_level_up(5, 250);
+        assert(should_level_up_5_250, 'Level 5 with 250 exp level up');
+        
+        // 300 exp: should level up
+        let should_level_up_5_300 = ExperienceCalculator::should_level_up(5, 300);
+        assert(should_level_up_5_300, 'Level 5 with 300 exp level up');
+    }
+    
+    #[test]
+    #[available_gas(1000000)]
+    fn test_remaining_exp_after_level_up() {
+        // Level 1 (needs 10 exp)
+        
+        // 9 exp: should remain at 9 (no level up)
+        let remaining_1_9 = ExperienceCalculator::remaining_exp_after_level_up(1, 9);
+        assert(remaining_1_9 == 9, 'Level 1 with 9 exp keep 9');
+        
+        // 10 exp: should remain at 0 (level up)
+        let remaining_1_10 = ExperienceCalculator::remaining_exp_after_level_up(1, 10);
+        assert(remaining_1_10 == 0, 'Level 1 with 10 exp 0 remaining');
+        
+        // 15 exp: should remain at 5 (level up)
+        let remaining_1_15 = ExperienceCalculator::remaining_exp_after_level_up(1, 15);
+        assert(remaining_1_15 == 5, 'Level 1 with 15 exp 5 remaining');
+        
+        // Level 5 (needs 250 exp)
+    
+        // 300 exp: should remain at 50 (level up)
+        let remaining_5_300 = ExperienceCalculator::remaining_exp_after_level_up(5, 300);
+        assert(remaining_5_300 == 50, 'Level 5 300 exp 50 remaining');
+    }
+    
+    #[test]
+    #[available_gas(1000000)]
+    fn test_multiple_level_ups_simulation() {
+        // Simulate a scenario where a beast levels up multiple times
+        
+        // Beast level 1 with 0 initial exp
+        let mut current_level = 1_u8;
+        let mut current_exp = 0_u16;
+        
+        // Earned 20 exp
+        current_exp += 20;
+        
+        // Validate if it should level up
+        let should_level = ExperienceCalculator::should_level_up(current_level, current_exp);
+        assert(should_level, 'Level up after more 20 exp');
+        
+        // Level up and update remaining exp
+        if should_level {
+            current_exp = ExperienceCalculator::remaining_exp_after_level_up(current_level, current_exp);
+            current_level += 1;
+        }
+        
+        // Verify final values
+        assert(current_level == 2, 'Should now be level 2');
+        assert(current_exp == 10, 'Should have 10 exp remaining');
+        
+        // Earned 50 more exp
+        current_exp += 50;
+        
+        // Validate if it should level up again
+        let should_level_again = ExperienceCalculator::should_level_up(current_level, current_exp);
+        assert(should_level_again, 'Level up 60 exp at level 2');
+        
+        // Level up again
+        if should_level_again {
+            current_exp = ExperienceCalculator::remaining_exp_after_level_up(current_level, current_exp);
+            current_level += 1;
+        }
+        
+        // Verify final values
+        assert(current_level == 3, 'Should now be level 3');
+        assert(current_exp == 20, 'Should have 20 exp remaining');
+        
+        // Should not level up to level 4 yet
+        let not_enough_for_level4 = ExperienceCalculator::should_level_up(current_level, current_exp);
+        assert(!not_enough_for_level4, 'Should not reach level 4 yet');
+    }
+}
\ No newline at end of file
diff --git a/backend/dojo_examples/combat_game/src/tests/test.experience_utils.cairo b/backend/dojo_examples/combat_game/src/tests/test.experience_utils.cairo
new file mode 100644
index 0000000..52d1ca0
--- /dev/null
+++ b/backend/dojo_examples/combat_game/src/tests/test.experience_utils.cairo
@@ -0,0 +1,90 @@
+use core::debug::PrintTrait;
+use core::traits::Into;
+use core::test::test_utils::assert_eq;
+
+use combat_game::helpers::experience_utils::{ExperienceCalculator, ExperienceCalculatorTrait, ExperienceCalculatorImpl};
+
+#[test]
+fn test_calculate_exp_needed_for_level() {
+    // Test level 1
+    let exp_needed = ExperienceCalculatorImpl::calculate_exp_needed_for_level(1);
+    assert_eq(exp_needed, 10, 'Level 1 should need 10 exp');
+
+    // Test level 2
+    let exp_needed = ExperienceCalculatorImpl::calculate_exp_needed_for_level(2);
+    assert_eq(exp_needed, 40, 'Level 2 should need 40 exp');
+
+    // Test level 5
+    let exp_needed = ExperienceCalculatorImpl::calculate_exp_needed_for_level(5);
+    assert_eq(exp_needed, 250, 'Level 5 should need 250 exp');
+
+    // Test level 10
+    let exp_needed = ExperienceCalculatorImpl::calculate_exp_needed_for_level(10);
+    assert_eq(exp_needed, 1000, 'Level 10 should need 1000 exp');
+
+    // Test level 20
+    let exp_needed = ExperienceCalculatorImpl::calculate_exp_needed_for_level(20);
+    assert_eq(exp_needed, 4000, 'Level 20 should need 4000 exp');
+}
+
+#[test]
+fn test_should_level_up() {
+    // Test level 1 with enough exp
+    let should_level = ExperienceCalculatorImpl::should_level_up(1, 10);
+    assert_eq(should_level, true, 'Should level up with exact exp needed');
+
+    // Test level 1 with not enough exp
+    let should_level = ExperienceCalculatorImpl::should_level_up(1, 9);
+    assert_eq(should_level, false, 'Should not level up with insufficient exp');
+
+    // Test level 2 with more than enough exp
+    let should_level = ExperienceCalculatorImpl::should_level_up(2, 50);
+    assert_eq(should_level, true, 'Should level up with excess exp');
+
+    // Test level 5 with exact exp needed
+    let should_level = ExperienceCalculatorImpl::should_level_up(5, 250);
+    assert_eq(should_level, true, 'Should level up with exact exp needed');
+}
+
+#[test]
+fn test_remaining_exp_after_level_up() {
+    // Test level 1 with exact exp needed
+    let remaining = ExperienceCalculatorImpl::remaining_exp_after_level_up(1, 10);
+    assert_eq(remaining, 0, 'Should have 0 exp remaining after level up');
+
+    // Test level 1 with excess exp
+    let remaining = ExperienceCalculatorImpl::remaining_exp_after_level_up(1, 15);
+    assert_eq(remaining, 5, 'Should have 5 exp remaining after level up');
+
+    // Test level 2 with not enough exp
+    let remaining = ExperienceCalculatorImpl::remaining_exp_after_level_up(2, 30);
+    assert_eq(remaining, 30, 'Should keep current exp if not enough for level up');
+
+    // Test level 5 with excess exp
+    let remaining = ExperienceCalculatorImpl::remaining_exp_after_level_up(5, 300);
+    assert_eq(remaining, 50, 'Should have 50 exp remaining after level up');
+}
+
+#[test]
+fn test_multiple_sequential_level_ups() {
+    let mut current_level: u8 = 1;
+    let mut current_exp: u16 = 100;
+
+    // First level up
+    let should_level = ExperienceCalculatorImpl::should_level_up(current_level, current_exp);
+    assert_eq(should_level, true, 'Should level up first time');
+    let remaining = ExperienceCalculatorImpl::remaining_exp_after_level_up(current_level, current_exp);
+    current_exp = remaining;
+    current_level += 1;
+
+    // Second level up
+    let should_level = ExperienceCalculatorImpl::should_level_up(current_level, current_exp);
+    assert_eq(should_level, true, 'Should level up second time');
+    let remaining = ExperienceCalculatorImpl::remaining_exp_after_level_up(current_level, current_exp);
+    current_exp = remaining;
+    current_level += 1;
+
+    // Check final state
+    assert_eq(current_level, 3, 'Should be level 3 after two level ups');
+    assert_eq(current_exp, 20, 'Should have 20 exp remaining after two level ups');
+} 
\ No newline at end of file