Since it's a mana cheap instant, you can do this in response to targeted or sweeping removal to get cards, as a sacrifice or it can send something to your graveyard about to get exiled by Swords to Plowshares, or to get value out of a chump blocker about to die anyway
These questions include: How many cards in are the cube
Liliana, Deaths Majesty can be the backbone of an even more dedicated reanimator deck, if we are so inclined: Creatures (13) 2 Ulamog, the Ceaseless Hunger 2 Kozilek, the Great Distortion 4 Archfiend of Ifnir 1 Desert Cerodon 4 Horror of the Broken Lands Planeswalkers (4) Lands (25) Spells (18) While we can just hang out, cycling Archfiends, Horrors, and Cerodons and then reanimating them, this list also has the ability to get Ulamog or Kozilek into the graveyard with Tormenting Voice, Cathartic Reunion, and Collective Brutality
Krark the Thumbless + Sakashima of a Thousand Faces Thumb Storm/Headache Tribal This unlikely pairing of a mysterious rogue and a goblin with poor fine motor skill is possibly my favorite partner combination in all of Magic