During either player's turn, when a card or effect is activated that targets this face-up card: You can send 1 Effect Monster you control to the Graveyard, and if you do, add up to 2 "Blue-Eyes" monsters with different names from your Deck to your hand. If this card is in your Graveyard: You can target 1 "Blue-Eyes" monster you control; shuffle it into the Deck, and if you do, Special Summon this card. You can only use 1 "Priestess with Eyes of Blue" effect per turn, and only once that turn.
Well, aren't you a piece of sunshine. Rata is no a gamer, he is a Yu-Gi-Oh youtuber. His channel got a lot of attention thanks to a series called Legacy of the Worthless, where he took a look at the worst archetypes in the TCG and what made them bad.