the grixis list is sweet but with out the tolaria wests it feels miserable the brain spoils are great tho but i feel like there should be a value enchantment that helps us just not die in the board or in the deck in place of one possibility storm like maybe from beyond even though its out of the colors we can still hard cast it from a pentad also works to get a endless one or if you need to get an emrakul to shuffle the GY back in idk im just brainstorming here after trying a sub par grixis ( was missing 3 tolaria west)
Eidolons thats a back breaker for the combo turn so that pesky rhetoric and the red one are the worst
http://www.channelfireball.com/home/commander-ishkanah-grafwidow/