This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by sending 2 Spell or Trap Cards you control to the Graveyard. You can destroy 1 Spell or Trap Card your opponent controls. If you activate this effect, this card cannot attack during this turn.
You can send a Field Spell Card to the Graveyard as part of the cost to Special Summon “Anteatereatingant”. You can also use a Monster Card treated as an Equip Card, such as a Union Monster or a monster equipped to “Relinquished".
Sends from your field to your Graveyard
Destroys your opponent's Spell Cards / Destroys your opponent's Trap Cards
Official Ruling states that it is once per turn. If you have further questions about it then you can go to a search engine (example google) type "yugioh (insert card name here) ruling" and find a site that has has the rulings.