Roy, Prince of Fire

First strike
You may exert Roy, Prince of Fire as it attacks.
When you do, Roy Prince of Fire deals 2 damage
to each creature your opponents control and each
opponent. (An exerted creature won't untap
during your next untap step)
At the beginning of your precombat main phase,
if an opponent was dealt 5 or more damage this
turn, you may untap Roy, Prince of Fire.