Oracle

Ongoing Scheme 

(An ongoing scheme remains face up until it's abandoned.)
At the beginning of your end step, you may put target creature card from an opponent's graveyard onto the battlefield under your control.
When a creature put onto the battlefield with this scheme dies, abandon this scheme.

NederMagic FAQ

Vraag: Hoe werkt een Scheme? Wat moet ik ermee?
Antwoord: Archenemy is een alternatief formaat dat Schemes gebruikt. Alle details kun je hier vinden.

Officiele rulings

6/15/2010
You put a creature card on the battlefield this way during the end step of each of your turns. As soon as any one of those creatures is put back into a graveyard for any reason, this scheme is abandoned.

6/15/2010
When this scheme is abandoned, nothing happens to the rest of the creatures that were put onto the battlefield with it. They simply remain on the battlefield.

Decktips