Diablo, The Prime Evil

Indestructible Hexproof
{2}{r},{t} Summon 4 2/2 Devils That have Haste
and "when this creature dies deal 2 damage to
any target"
{6}, {t} Summon a 0/8 Black Soulstone with
"When this creature dies Diablo, The Prime Evil
Gets 10 +1/+1 Counters.
Gain Immunity to everything until the end of turn.