Ghoulcaller's Harvest — ruling 1

You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast.

Ghoulcaller's Harvest — ruling 2

You must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can cast a sorcery using flashback only when you could normally cast a sorcery.

Ghoulcaller's Harvest — ruling 3

To determine the total cost of a spell, start with the mana cost or alternative cost (such as a flashback cost) you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.

Ghoulcaller's Harvest — ruling 4

"Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack."

Ghoulcaller's Harvest — ruling 5

A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.

Ghoulcaller's Harvest — ruling 6

If a card with flashback is put into your graveyard during your turn, you can cast it if it's legal to do so before any other player can take any actions.

Ghoulcaller's Harvest — ruling 7

Decayed does not grant haste. Creatures with decayed that enter the battlefield during your turn may not attack until your next turn.

Ghoulcaller's Harvest — ruling 8

Once a creature with decayed attacks, it will be sacrificed at end of combat, even if it no longer has decayed at that time.

Ghoulcaller's Harvest : règles, fonctionnement et interactions (MTG)

Ghoulcaller's Harvest is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Create X 2/2 black Zombie creature tokens with decayed, where X is half the number of creature cards in your graveyard, rounded up. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.) Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

How it works : Ghoulcaller's Harvest

Original English text — Wizards of the Coast / Scryfall

#1June 6, 2025· Wizards of the Coast
You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast.
No other card is named in this ruling.
#2June 6, 2025· Wizards of the Coast
You must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can cast a sorcery using flashback only when you could normally cast a sorcery.
No other card is named in this ruling.
#3June 6, 2025· Wizards of the Coast
To determine the total cost of a spell, start with the mana cost or alternative cost (such as a flashback cost) you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
No other card is named in this ruling.
#4June 6, 2025· Wizards of the Coast
"Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack."
No other card is named in this ruling.
#5June 6, 2025· Wizards of the Coast
A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.
No other card is named in this ruling.
#6June 6, 2025· Wizards of the Coast
If a card with flashback is put into your graveyard during your turn, you can cast it if it's legal to do so before any other player can take any actions.
No other card is named in this ruling.
#7September 24, 2021· Wizards of the Coast
Decayed does not grant haste. Creatures with decayed that enter the battlefield during your turn may not attack until your next turn.
No other card is named in this ruling.
#8September 24, 2021· Wizards of the Coast
Once a creature with decayed attacks, it will be sacrificed at end of combat, even if it no longer has decayed at that time.
No other card is named in this ruling.
#9September 24, 2021· Wizards of the Coast
Decayed does not create any attacking requirements. You may choose not to attack with a creature that has decayed.
No other card is named in this ruling.
#10September 24, 2021· Wizards of the Coast
Decayed represents a static ability and a triggered ability. "Decayed" means "This creature can't block" and "When this creature attacks, sacrifice it at end of combat."
No other card is named in this ruling.