Dakham, Chosen of Chaos

Whenever Dakham, Chosen of Chaos attacks,
roll a six-sided die.
1, 2 or 3 - Dakham, Chosen of Chaos gains
+2/+2 and menace until end of turn.
4 or 5 - Dakham, Chosen of Chaos gains indestructible until end of turn.
6 - If a source would deal damage to a permanent
or player this turn, it deals double that damage
instead.