Royce, Stealer of Souls

Hexproof, Deathtouch, Indestructible
Whenever a creature dies, put a soul counter on
Royce, Stealer of Souls.
{b} {1}Sacrifice a creature, draw a card.
{b}{b}{r}{r}{2} Destroy all non-cat creatures.
If Royce, Stealer of Souls has 10 or more soul counters on it, transform it.