Erebus, aether ghost

Reach,Flash,Phaseing,Ghost(roll a d6 when this takes damage if you roll a 4,5, or 6 negate the damage
When this enters create x aether night stalker tokens (2/2 Ghost)
When this phases create a aether night stalker token and three {e}
{u}{b}{2}:Untap this creature
2{e}Phase this creature