Mothman, Herald of Doom

Hexproof, flying
When Mothman enters the battlefield role a d20.
Put that many doom counters on it. If Mothman
is dealt combat damage remove that many
counters instead. When all counters are removed
it deals damage equal to the number of counters
it entered with to each creature.
Doom counters on this creature can only be
added or removed by its abilities.