When this card is activated: You can add 1 "Dogmatika" Ritual Monster or 1 "Dogmatika" Ritual Spell from your Deck to your hand, then if your opponent controls a monster, you can add 1 "Dogmatika" card from your Deck to your hand. Once per turn, if you control a "Dogmatika" Ritual Monster: You can look at either player's Extra Deck, and send 1 monster from it to the GY. You can only activate 1 "Dogmatikamatrix" per turn.