Vicci, the Voidless

Deathtouch, Vigilance, Haste, Indestructible

When this creature enters, target opponent: until their next end step, whenever they would add any mana of any color(s), they add your choice of {w}, {u}, {b}, {r}, or {g}, instead.

Sacrifice another creature: Put +1/+1 counters on this creature equal to the power of the sacrificed creature. It gains trample until the next end step.