Sacrifice after III.) I, II Put a +1/+1 counter on target creature you control with the greatest power
I found that when included in the Stasis Prison deck, if I drew it any time in the early game, it just sat in my hand doing nothing
Equip only as a sorcery.) Equip (: Attach to target creature you control
As we can see, there's a keyworded mechanic, Blight, that uses this counter type, and presumably the theme will get plenty of support in this set
(Damage and effects that say "destroy" don't destroy it.) Whenever you sacrifice a permanent, target opponent loses 1 life and you gain 1 life
It then grants the equipped creature indestructible, and if you ever want to move it onto another creature, you can pay three mana to do so