Invincible Duo, Zamasu/Rose

Invincible Duo, Zamasu/Rose isn't a creature if you don't control a Monster type Creature.
If Invincible Duo, Zamasu/Rose is a creature, it is indestructible and has double strike
Monster type creatures also have double strike when Invincible Duo, Zamasu/Rose and they ignore the Legendary Creature Rule
The pair of gods faced down their foes with certainty of victory