Skull Throne

Indestructible
Whenever a creature dies, put a blood counter on
The Skull Throne.
Remove three blood counters: Create a 3/3 black
red demon creature token named Blood letter.
Remove eight blood counters: Create an 8/8 black
red demon creature token named Blood Thirster
with, flying and "When this creature dies add an
additional blood counter to The Skull Throne."