Coffin Queen

You may choose not to untap Coffin Queen during your untap step.
{2}{B}, {T}: Put target creature card from a graveyard onto the battlefield under your control. When Coffin Queen becomes untapped or you lose control of Coffin Queen, exile that creature.

The List

Secret Lair Drop

Tempest Remastered

Tempest

You may choose not to untap Coffin Queen during your untap phase.
o2o
B, oc
T: Put target creature card from any graveyard into play under your control. Remove that creature from the game if Coffin Queen becomes untapped or if you lose control of Coffin Queen.

If the creature put onto the battlefield leaves the battlefield, the tracking effect ends and the creature will no longer be exiled if something happens to the Coffin Queen.

If the creature put onto the battlefield phases out, the tracking effect continues when it phases back in if the Coffin Queen is still on the battlefield. If the Queen left the battlefield while the creature was phased out, the creature phases in as normal.

If Coffin Queen leaves the battlefield before its ability resolves, the delayed trigger condition can never be fulfilled, so the creature will not be exiled. If Coffin Queen is untapped when its ability resolves, the creature will not be exiled until the next time Coffin Queen becomes untapped.