Necromancer Decree

Undead type creatures you control have undying.
If Necromantic Decree would be put into your graveyard from play, return up to two undead
type creatures from your graveyard to the battlefield with one persist counter on each.
(Creatures with persist counters on them have persist.)
"They get knocked down, but they get up again. You're
never going to keep them down." - Chumba to Wumba