Täähl, The Silent Past

Indestructible
Whenever a creature an opponent controls dies,
they mill cards equal to its power, if a creature is
milled this way, you may pay {2}{b} and exile it, if
you do create a token copy of it, except it's a black zombie in addition to its types.
{t}, If an opponent milled cards this turn, add {u} or {b} to your manapool. Otherwise add {c} to your manapool.