Mega Swampert

Trample, Swampwalk

You may cast this card without paying its mana cost by exiling a face up Swampert, Mud Dweller you control.

When Mega Swampert enters, destroy all creatures with Mud Counters on them and put X +1/+1 counter on Mega Swampert and scry X, where
X is the number of creatures destroyed this way.