Lilith, Edgar's Heir

Partnered with Rez, Olivia;s Heir
Flying, Vigilance
Whenever a creature enters the battlefield
you may discard a card or pay three life to put
a +1/+1 counter onto target creature. It becomes
a vampire in addition to its other types.
{1}{b/r}{b/r},{t}: Gain conrrol of target vampire until
end of turn and vampires you control gain lifelink
until end of turn