Wildgrowth Walker

Creature - Elemental

Whenever a creature you control explores, put a +1/+1 counter on Wildgrowth Walker and you gain 3 life.

"Hear me, stone, root, branch: be the fist of this land. Turn back those who trample upon your domain."
—Song of the Shaper

1/3

2017-09-29 If Wildgrowth Walker leaves the battlefield while its triggered ability is on the stack, you won't put a +1/+1 counter on anything but you will gain 3 life.
2017-09-29 If a creature leaves the battlefield before an effect instructs it to explore, it still explores. Effects that trigger when a creature you control explores, such as that of Wildgrowth Walker, trigger if appropriate.

Card is in preconstructed decks:

mtg.wtf