Flying, haste

When Cucco Swarm enters the battlefield, if it was beckoned, create X 1/1 red Bird creature tokens with flying and haste. Then choose up to one target creature or planeswalker you don’t control. Each creature you control with flying deals damage equal to its power to that creature or planeswalker.

Beckon {3}{R}{R}{R}, Sacrifice X artifacts. X can’t be zero.