Korvold, Gleeful Glutton 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
This spell costsless to cast for each card type among permanents you've sacrificed this turn. Flying, trample, haste Whenever Korvold deals combat damage to a player, put X +1/+1 counters on Korvold and draw X cards, where X is the number of permanent types among cards in your graveyard.
Complete guide
Meet Korvold, Gleeful Glutton, a massive legendary Dragon that thrives on the consumption of your own resources. This powerhouse rewards you for sacrificing permanents and turns your well-stocked graveyard into a font of massive power and card advantage.
A Hunger for Variety
Korvold features a cost-reduction ability that tracks how many different card types you have sacrificed during the current turn. The recognized permanent types are artifact, battle, creature, enchantment, land, and planeswalker. Each unique type sacrificed reduces the generic mana cost by {1}, though you must always pay at least {B}{R}{G}.
Resolution Step-by-Step
First, as you cast Korvold, the game checks the types of permanents you have sacrificed this turn to determine the total cost. Once Korvold enters the battlefield and successfully deals combat damage to a player, a triggered ability goes on the stack. Upon resolution, you count the number of permanent types currently in your graveyard to determine the value of X. Finally, you place X +1/+1 counters on Korvold and draw X cards simultaneously.
Common Mistakes
Players often confuse supertypes with card types; note that 'Legendary' and 'Snow' do not reduce the cost or increase the value of X. Additionally, remember that Korvold's mana value remains 8 regardless of how much you actually paid to cast him. Lastly, if your graveyard is empty when the combat damage ability resolves, X will be 0, resulting in no counters and no cards drawn.
When to Play Korvold
Korvold is best played mid-to-late game after you have used fetch lands, sacrificial artifacts, or creatures to fill your graveyard. Because he has haste, he can immediately attack a defenseless player to recoup the resources spent on his summoning.
Interaction examples
If you sacrifice a creature and a land during your main phase, Korvold will cost {3}{B}{R}{G} to cast. Even if you sacrifice five creatures, the cost only reduces by {1} because only one type (creature) was represented among the sacrificed permanents.
With Korvold already on the battlefield, you cast Craterhoof Behemoth. If you control five creatures, Korvold gets +5/+5 and trample. When Korvold deals combat damage, if your graveyard contains a Land, a Creature, and an Enchantment, you will add three +1/+1 counters to him and draw three cards.
You can sacrifice the Plant tokens created by Avenger of Zendikar to trigger other sacrifice effects. While 'Token' isn't a type, the Plant tokens are 'Creatures.' Sacrificing a Plant token will contribute 'Creature' to Korvold's cost-reduction ability for that turn.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Korvold, Gleeful Glutton
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
The permanent types are artifact, battle, creature, enchantment, land, and planeswalker. Things like "legendary" or "snow" are supertypes, not types. "Token" is not a type.
No other card is named in this ruling.
- #2· Wizards of the Coast
The cost-reduction ability of Korvold, Gleeful Glutton doesn't change its mana cost or mana value, only the total cost you pay. Specifically, the mana value of Korvold, Gleeful Glutton is always 8.
No other card is named in this ruling.
- #3· Wizards of the Coast
Korvold's cost-reduction ability doesn't affect the colored mana in its mana cost. It can't reduce its cost to less than
.
No other card is named in this ruling.
Legal formats
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Meta decks with Korvold, Gleeful Glutton
No archived Top 8 deck with this card yet.



Craterhoof Behemoth
Avenger of Zendikar