Red-Green: Storm This final color pair, opposite U/B on the color pie, seems to be filling a similar supporting role
The loss of life and card advantage allow Vampiric to reasonably just cost one which in turn allows you to keep even one land hands if they are good enough and you have Vamp to get you out of it
If you gain an amount of life "for each" of something or "equal to the number" of something, that life is gained as one event and the ability of Bilbo, Birthday Celebrant applies only once
So you want to build a Black Commander deck
Except this card lets you dump mana at instant speed, and has the far more explosive potential to reanimate any OTHER creature when it connects on your next turn
Admittedly it is very effective at that, but you have to consider that a giant creature like that is of absolutely no use in the early game, before you've accumulated the 10 mana required to cast it, which is when you typically need the secondary effects of your finishers most