Xandra, Pactbroker

Activated abilities of Xandra, Pactbroker cost an additional 1 life to activate.
{b}, {t}: Put a pact counter on target Angel,
Demon, Devil, or Dragon.
Xandra has all activated abilities of creatures with
pact counters on them while it's on the battlefield
or in your graveyard. You may spend mana as
though it were mana of any color to activate
those abilities.