Formidable — Whenever Stampeding Elk Herd attacks, if creatures you control have total power 8 or greater, creatures you control gain trample until end of turn.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

At the beginning of your upkeep, return a green creature you control to its owner's hand.