Whip of Erebos

Mana cost: {2}{B}{B}
Type: Legendary Enchantment Artifact
Set: Duskmourn: House of Horror Commander #159 (rare)
Price: $9.59 USD

Creatures you control have lifelink.
{2}{B}{B}, {T}: Return target creature card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step. If it would leave the battlefield, exile it instead of putting it anywhere else. Activate only as a sorcery.

Whip of Erebos has 6 printings, first in Theros (2013). EDHREC ranks it #713 among Commander cards. It appears most in Be'lakor, the Dark Master decks (8,051 on EDHREC). 1 public deck on TCG runs it. It has 4 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Whip of Erebos

Death Toll - Duskmourn: House of Horror Commander, led by Winter, Cynical Opportunist

Commanders that run Whip of Erebos most

Deck counts from EDHREC.

Be'lakor, the Dark Master: 8,051 decks
Winter, Cynical Opportunist: 5,307 decks
Kuja, Genome Sorcerer // Trance Kuja, Fate Defied: 4,528 decks
Betor, Ancestor's Voice: 4,140 decks
Blech, Loafing Pest: 3,933 decks
K'rrik, Son of Yawgmoth: 3,908 decks
Kaalia of the Vast: 3,369 decks
Valgavoth, Harrower of Souls: 3,105 decks

Often played with Whip of Erebos

Cards that show up in the same decks on EDHREC.

Rulings

2013-09-15: Whip of Erebos grants haste to the creature that's returned to the battlefield. However, neither of the "exile" abilities is granted to that creature. If that creature loses all its abilities, it will still be exiled at the beginning of the end step, and if it would leave the battlefield, it is still exiled instead.
2013-09-15: At the beginning of the next end step, the creature returned to the battlefield with Whip of Erebos is exiled. This is a delayed triggered ability. If the ability is countered, the creature will stay on the battlefield and the delayed trigger won't trigger again. However, the replacement effect will still exile the creature when it eventually leaves the battlefield.
2013-09-15: If a creature returned to the battlefield with Whip of Erebos would leave the battlefield for any reason, it's exiled instead. However, if that creature is already being exiled, then the replacement effect won't apply. If the spell or ability that exiles it later returns it to the battlefield (as Chained to the Rocks might, for example), the creature card will return to the battlefield as a new object with no relation to its previous existence. The effects from Whip of Erebos will no longer apply to it.
2013-09-15: The exiled creature is never put into the graveyard. Any abilities the creature has that trigger when it dies won't trigger.