Yharnam

{t} Add {c}
{u}, {c} Curse of Yharnam: Add {b}{b} to your mana
pool. One creature you control gains a -1/-1
counter. If a creature's power is reduced to 0 by
this effect, the creature transforms into a 1/1
Yharnam beastman token with haste.
—
Yharnam is the home of blood ministration. You need
only unravel its mystery.