* Summoning Rules: In most card games, you need to match the total star rating (or Level, Rank, etc.) of the monsters you tribute to the required level of the monster you're summoning.
* Simple Math: 10 stars total cannot be divided evenly into two groups of 5 stars.
Possible Solutions:
* Tribute 2 Monsters: You could tribute two monsters with a combined 10 stars (like a 6-star and a 4-star) to summon a single 10-star monster.
* Different Summoning Method: There might be other summoning methods in the game you're referring to that don't require an exact star match. Check the summoning conditions of the specific monsters you're trying to summon.
* Specific Card Effects: Some cards have special effects that allow you to summon monsters with different star requirements.
Let me know if you'd like me to look into a specific card game or specific cards to help you figure out how to summon these monsters!