Claira, Champion of Dreams

First Strike, Shroud, Flying,

When Claira enters the battlefield or attacks, put a +1/+1 counter on Spirits, Wraiths, Nightmares you control.

{t}{r}{r} Deal damage equal to the number of +1/+1 counters among creatures you control to target creature or plainswalker.

{t}{u}{u} Draw cards equal to the number of +1/+1 counters among creatures you control.