Wildheart Invoker is a common Creature — Elf Shaman card from Masters 25 (A25), collector number 194. Current market price: $0.04 (foil $0.10), TCGplayer market prices via Scryfall.
{8}: Target creature gets +5/+5 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)