Box of Ultimate Bliss

Indestructible
Pay 2 life, {t}, Put a charge counter on Box of
Ultimate Bliss: Add one mana of any color.
As long as Box of Ultimate Bliss has five or more
charge counters on it, Box of Ultimate Bliss is a
10/10 black Horror creature with deathtouch in
addition to its other types.
Once opened, a monster named Satori, comes out.