3 Level 9 monsters

When this card is Special Summoned: Destroy the monsters with String Counters, and if you do, draw 1 card, then inflict damage to your opponent equal to the highest original ATK among those destroyed monsters in the Graveyard (your choice, if tied). Once per turn: You can detach 1 Xyz Material from this card; place 1 String Counter on each face-up monster your opponent controls.