Collective Effort is a rare Sorcery card from Eldritch Moon (EMN), collector number 17. Current market price: $0.30 (foil $0.50), TCGplayer market prices via Scryfall.
Escalate—Tap an untapped creature you control. (Pay this cost for each mode chosen beyond the first.) Choose one or more — • Destroy target creature with power 4 or greater. • Destroy target enchantment. • Put a +1/+1 counter on each creature target player controls.