When you cast Kozilek, Butcher of truth, draw 4 cards
Annihilator 4
When Kozelik is put into a graveyard from anywhere, its owner shuffles his/her graveyard into his/her library.
Possible new oath target. Here's the disadvantage and its a big one:
No immediate impact on the board from oath/show and tell. But a lot of people use Emrakul with the same drawback.
Here's the positive: Frees up 3-4 card slots in oath which could be huge depending on how their used. Its rare that a creature based oath (as opposed to a combo oath) doesn't have 1-2 memory's journey or gaea's blessing. This combines those affects w/ your oath target. You could put more card draw, more counters, more utility or suddenly have 2 cards dedicated to metagame hate.
Oath often runs 1-2 journey/blessing and 2-3 creatures. If you just run 2 of these that is 3 spots freed up for whatever you choose.
If you are a fan of drain in oath like I am (usually run 2) this is potentially hard-castable with no colored mana requirements in a pinch.
Depending on your deck list being able to add in meta hate like targeted removal in a mentor heavy meta or hurykl's in a shops heavy or even nihil spellbomb could swing some game 1 losses into wins.
