Five mana, net a 4/4 first strike and a tutored for legendary card of any type slotted into your hand
Whod do a silly thing like mix all your card sets together to build your own crazy decks Imotekh the Stormlord Oh manare all Necrons going to be Mono-black
Mono-White Lifegain really shines when you can get a critical mass of lifegain pieces in play, and these provide that for the lowest cost possible
You do, however, need this card to actually win
First, the champion, playing Mono-Black Necro Control: Creatures (7) Lands (23) Spells (30) 4 Nevinyrral's Disk 1 Hymn to Tourach 4 Necropotence 1 Ivory Tower 4 Dark Ritual 4 Drain Life 3 Stupor 2 Mind Warp 3 Contagion 1 Serrated Arrows 2 Demonic Consultation 1 Zuran Orb Sideboard Then, in third place, representing the aggro decks of the format, Brian Hackers Bad Moon Necro: Creatures (19) Lands (21) Spells (20) And then finally carrying on the fine tradition of B/r Necro-decks, Chris Pikula, who actually increased the red presence in the deck with Incinerates and multiple maindeck Shatters (Winter Orb, Howling Mine, Serrated Arrows, even Black Vise, Ivory Tower, and Zuran Orb were worthy targets)
though those are often the enablers, you can also use shield counters, finality counters, and plenty more