Overwhelming Victory is a rare Instant — Lesson card from Avatar: The Last Airbender Eternal (TLE), collector number 196. Current market price: $1.20 (foil $1.49), TCGplayer market prices via Scryfall.
Overwhelming Victory deals 5 damage to target creature. Each creature you control gains trample and gets +X/+0 until end of turn, where X is the amount of excess damage dealt this way.