Spongenerd

Spongenerd enters the battlefield with X goob counters.
{w}{w}{u}{u}, Remove one goob counter-choose 1—
•Spongenerd deals X damage to target creature or planeswalker.
•Look at the top X cards of target library. Put up
to half of these cards on the bottom of their
owner's library, rounded down.
•Remove X counters of any kind from any target.