Eater of Millions

[ Fiend / Effect ] Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by banishing 5 or more cards from your hand, field, and/or Extra Deck, face-down. This card gains 100 ATK/DEF for each face-down banished card. This card cannot be Tributed, nor used as material for a Fusion, Synchro, or Xyz Summon. Once per turn, at the start of the Damage Step, if this card battles an opponent's monster: You can banish that opponent's monster, face-down. ATK/ 0 DEF/ 0