Unstoppable Ash is a rare Creature — Treefolk Warrior card from The List (PLST), collector number MOR-137. Current market price: $2.50, TCGplayer market prices via Scryfall.
Trample Champion a Treefolk or Warrior (When this enters, sacrifice it unless you exile another Treefolk or Warrior you control. When this leaves the battlefield, that card returns to the battlefield.) Whenever a creature you control becomes blocked, it gets +0/+5 until end of turn.