1- You gain a ton of life (lifelink, Rhox faithmender, boon reflection, Alhamaret archive, planeswalker, soul warden etc.)
2- You can draw a lot of cards (greed, phyrexian arena, erebos, alhamaret archive, dawn of hope, arguel Bloodsfast, bloodgift demon...)
3- You can deal with a lot of threats with spells that exile permanents easily. (instants and sorcerise that exiles permanent, Karlov, Vona and planeswalkers...)
4- You can harass your oponent by taking some life every turns. (polluted bonds, blood artist, sutur priest, exquisite blood, painful quandary, blind obedience...)
5- You like planeswalkers, there is plenty of it.
6- You can create a lot of tokens and protect your planeswalker (anoinetd procession, dwan of hope, divine visitation, elspeth, sorin)
7- You can play with your graveyard and bring back some creatures and enchantements (sun titan, unburial rites, palace siege)
8- Never be out of mana (land tax, sword of the animist)
9- Graveyard hate (Kaya, Bojuka Bog)
10- Protection against attacks (ghostly prison, norn's annex, windborn muse, authority of consuls, blind obedience, teferi protection... )
11- Final Blow (aetherflux reservoir, debt to deathless).