Don't worry about diminishing returns here
Furthermore, it can also catch the opponent off guard when they are chaining effects, making players able to take control of a game right before the time limit is called by the judge
If you cracked it in a pack when it came out, lucky you
If your opponent Special Summons a monster(s), or you activate an "Ancient Warriors" monster's effect (except during the Damage Step): You can make all "Ancient Warriors" monsters you control gain 300 ATK for each "Ancient Warriors" monster you control until the end of this turn (even if this card leaves the field)
While presumably she originally used Fusion Summoning like her fellow students, she refuses to use it due to her enmity with Duel Academy and instead her Deck focuses on Ritual Summoning
This type of character is popular nowadays, and Im so glad for the chance to paint her