Mr. Lieutenant Krabs

Explore (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put
a +1/+1 counter on this creature, then put the card back on top or into your graveyard.)
When Mr. Lieutenant Crabs enters the battlefield, target player puts the top x cards of their library to their graveyard.
(X is the casting cost. X cant be 0)
"You're a mystery, SpongeBob"