Gift of Growth is a common Instant card from The List (PLST), collector number DOM-163. Current market price: $0.34, TCGplayer market prices via Scryfall.
Kicker {2} (You may pay an additional {2} as you cast this spell.) Untap target creature. It gets +2/+2 until end of turn. If this spell was kicked, that creature gets +4/+4 until end of turn instead.