Evigishki Tetrogre

You can Ritual Summon this card with any "Gishki" Ritual Spell Card. Once per turn: You can declare 1 card type (Monster, Spell, or Trap); your opponent can discard 1 card to negate this card's effect, otherwise both players send 1 card of the declared type from their Main Deck to the Graveyard.

Aqua WATER Ritual Effect Monster 6 ritual