Flying legion's rescue doggo

Vigilance, First strike
Flying legion's rescue doggo enters the battlefield
with a flying counter on it.
Crash — Remove a flying counter from Flying
legion's rescue doggo and tap it. Then if you
control both a red and white creature,
red creatures get +1/+0 and white creatures get
+0/+1 until end of turn.
Activate only as a sorcery.