Stonewood Invocation is a rare Instant card from Time Spiral (TSP), collector number 223. Current market price: $1.07 (foil $6.88), TCGplayer market prices via Scryfall.
Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) Target creature gets +5/+5 and gains shroud until end of turn. (It can't be the target of spells or abilities.)