This is a little worse than Vampire's Vengeance from a surgery standpoint (and you don't get the Blood token) but has some wider targeting (actually, strangely not specifically "target"-ing, and not a crime) applications that give it some consideration
Even its high cmc may not be a problem, as it has Convoke, so our creatures can help cast it
There are several criteria being tracked by the current bracket system, including resource generation, speed, reliability, and oppression, and possibly others
This can create a situation where some Leader cards can have a lot of Life, but are weak in battle, while other Leader cards provide few Life, but are strong or have great effects
(You may return a land card from your graveyard to your hand and mill two cards instead of drawing a card.) Land cards in your graveyard have dredge 2