Cauldron Haze

Instant, 1{W/B} (2)
Choose any number of target creatures. Each of those creatures gains persist until end of turn. (When it's put into a graveyard from the battlefield, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)¹
Illus. Brandon Kitkouski

Gatherer Card Rulings [Nov 2009]

• 8/1/2008: If a nontoken creature that gains persist this way is put into a graveyard, that card will be returned to the battlefield with a -1/-1 counter on it. However, because it's a new object with no relation to its previous existence, that permanent will not have persist.
• 8/1/2008: If a creature has multiple instances of persist, the result is largely the same as having just one instance of persist. When the creature is put into a graveyard, each persist ability will trigger. The first one to resolve will return the creature to the battlefield with a -1/-1 counter on it. The rest will do nothing.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/9)	Eventide (Uncommon)