Demogorgon Brood Mother

{3}{b}: Whenever Demogorgon Brood Mother
phases out.
Whenever Demogorgon Brood Mother phases
back in, create a 1/1 black Demoworm token with
"whenever a creature on the battlefield gets an infection counter, put a +1/+1 counter on this
token." and "sacrifice this creature: Search your
deck for a horror creature with a mana value
equal to or less than the number of +1/+1
counters on this token."