Silfyxis, Ghostfire Master

Deathtouch
{t}, Sacrifice another creature: Put a charge
counter on Silfyxis, Ghostfire Master.
{t}, Remove X charge counters from Silfyxis, Ghostfire Master: Add X {c}. Spend this mana
only to cast noncreature spells. If a spell cast with
this mana would deal damage to a target, it deals
X damage to that target instead.