Eldrazi depth learker

Protection from blue
Depth learker enters the battlefield
with one learking charge counter. (Whenever a
card is put into the graveyard, put a learking
charge on depth learker. "{t} depth learker and subtract {x} learking charges. Create a token copy
of this card, then put {x} amount of cards from
your graveyard or exile, on top
of your library. If you discard a card, subtract a learking charge")