You might not take two from this yourself but I think I would happily pay that to prevent lifegain potential in a lot of red decks
Second, being able to get creatures back is a form of card advantage, and black could really use a Tome
From there you can evaluate if the expected value of that set is higher than the list price
Creatures (6) Planeswalkers (1) Lands (16) Spells (37) 2 Sensei's Divining Top 1 Brainstorm 4 Mana Drain 1 Vampiric Tutor 1 Mystical Tutor 1 Yawgmoth's Will 4 Force of Will 1 Sol Ring 1 Demonic Tutor 1 Hurkyl's Recall 1 Time Walk 1 Ancestral Recall 1 Mana Crypt 1 Time Vault 1 1 Merchant Scroll 1 Rack and Ruin 1 Thirst for Knowledge 1 Chain of Vapor 1 Misdirection 1 Tinker 1 Voltaic Key 1 Black Lotus 1 Fact or Fiction 1 Mox Emerald 1 Mox Jet 1 Mox Pearl 1 Mox Ruby 1 Mox Sapphire 1 Darkblast The life loss is just not that big a deal in powered formats anyway
The only issue I have with Kellen is that he's a faerie that doesn't have flying, and doesn't get flying from any of his upgrades
A constant flow of life isnt going to win games, so were also going to dedicate a healthy amount of our deck to buffs like Benalish Marshal, Intangible Virtue, Phantom General, and Spear of Heliod