Nerve Cluster

Zerg creatures you control get +1/+1. At the beginning of combat on your turn, if you control three or more lands with creep counters, target Zerg creature you control gains We Are the Swarm until end of turn. Whenever a Zerg creature you control with one or more counters on it dies, draw a card. {T}: Sacrifice a Zerg creature, put a creep counter on target basic land you control.