End of the World Ruler

You can Ritual Summon this card with an "End of the World" card. This card's name becomes "Demise, King of Armageddon" while in the hand or field. You can only use each of the following effects of "End of the World Ruler" once per turn. You can reveal this card in your hand, pay 2000 LP, and banish 1 Ritual Spell from your Deck; apply that card's activation effect that Ritual Summons a monster. You can pay 2000 LP; destroy as many other cards on the field as possible, then this card gains 2900 ATK.