Entomb itself is sweet if you have the right support. I would maybe try it and Gravebreaker if I was running a slightly lower power graveyard-centric environment.
I have it on a couple cards in Eldrazi Domain but I don't know if I'd consider it a success. The cards that are playable without a good populate are the only ones really left in the list.
Here are my 'Genius' and 'Spicy' cards from the cube I randomly sampled April 15th.
Chained to the Rocks
Extricator of Sin
Hallowed Burial
Evasive Action
Squelch
Scatter to the Winds
Soul Reap
Oath of Chandra
Growth Spasm
Centaur Vinecrasher
Woodland Wanderer
Rise // Fall
Jinxed Idol
Narset...