Extractor Demon

Flying
Whenever another creature leaves the battlefield, you may have target player put the top two cards of their library into their graveyard.
Unearth {2}{B} ({2}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Flying
Whenever another creature leaves the battlefield, you may have target player mill two cards.
Unearth {2}{B} ({2}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Flying
Whenever another creature leaves play, you may have target player put the top two cards of his or her library into his or her graveyard.
Unearth {2B} ({2B}: Return this card from your graveyard to play. It gains haste. Remove it from the game at end of turn or if it would leave play. Unearth only as a sorcery.)

Commander Anthology Volume II

Commander Anthology

Flying
Whenever another creature leaves the battlefield, you may have target player put the top two cards of his or her library into his or her graveyard.
Unearth {2}{B} ({2}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Modern Masters 2017

Commander 2015

FlyingWhenever another creature leaves the battlefield, you may have target player put the top two cards of his or her library into his or her graveyard.Unearth {2}{B} ({2}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)