Imagine if you could turn Ajani's Pridemate into a Vampire-like creature with flying. Well, here's your chance to try it out!
If you manage to get a life gain engine when this is on board, then the clock will start ticking very quickly for your opponent.
The best place for this card is in the black-white archetype with a new Sorin planeswalker that gives Lifelink to Vampire creatures you control. If you can put those two cards together, then it's just a matter of time before you win.