(Scab-Crypt isn't a spell.)
Scab-Crypt enters the battlefield tapped.
Scab-Crypt is indestructible. (Destroy effects and lethal damage don't destroy it.)
: Add or to your mana pool.
Sacrifice Scab-Crypt: Add or to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool.
