Ride the Avalanche is a rare Instant card from Forgotten Realms Commander (AFC), collector number 325. Current market price: $0.50, TCGplayer market prices via Scryfall.
The next spell you cast this turn can be cast as though it had flash. When you next cast a spell this turn, put X +1/+1 counters on up to one target creature, where X is the mana value of that spell.