Ivy Seer is a uncommon Creature — Elf Wizard card from Urza's Destiny (UDS), collector number 110. Current market price: $0.21 (foil $2.91), TCGplayer market prices via Scryfall.
{2}{G}, {T}: Reveal any number of green cards in your hand. Target creature gets +X/+X until end of turn, where X is the number of cards revealed this way.