You can target 1 of your Spellcaster monsters that is banished or in your GY; shuffle it into the Deck, and if you do, add 1 "Witchcrafter" Spell from your Deck to your hand.
If this card is in your GY, except the turn it was sent there: You can banish this card, then target any number of your banished "Witchcrafter" Spells with different names; add them to your hand.
You can only use each effect of "Witchcrafter Patronus" once per turn.