Griselbrand's defeat did not mark the end of the Skirsdag cult. They simply turned their worship to the next demon to emerge from the shadows bearing offers of power.
When Shipwreck Sifters enters the battlefield, draw a card, then discard a card. Whenever you discard a Spirit card or a card with disturb, put a +1/+1 counter on Shipwreck Sifters.
Flying When Phantom Carriage enters the battlefield, you may search your library for a card with flashback or disturb, put it into your graveyard, then shuffle.
Passage to the abyss is free, but the return trip will cost you.
Flying Whenever Archive Haunt attacks, draw a card, then discard a card. If Archive Haunt would be put into a graveyard from anywhere, exile it instead.
Cleaning up his life's work was his afterlife's work.
When Organ Hoarder enters the battlefield, look at the top three cards of your library, then put one of them into your hand and the rest into your graveyard.
The stitcher died years ago, but her dutiful assistant still keeps the laboratory well stocked.
When Ominous Roost enters the battlefield or whenever you cast a spell from your graveyard, create a 1/1 blue Bird creature token with flying and "This creature can block only creatures with flying."
"One raven is a bad omen. Two are a curse. I don't know what this is, but it can't be good." —Verna, priest of Sigarda
Enchant creature When Locked in the Cemetery enters the battlefield, if there are five or more cards in your graveyard, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step.
Return target nonland permanent to its owner's hand. If you controlled that permanent, draw a card.
Necro-alchemists gained popular support during the Travails, when geist-fueled weapons helped defend towns against mad cultists and Eldrazi monstrosities.