Cradle Guard is a uncommon Creature — Treefolk card from The List (PLST), collector number USG-245. Current market price: $0.18, TCGplayer market prices via Scryfall.
Trample Echo {1}{G}{G} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)