Black Sun's Zenith 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
Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.
Complete guide
Black Sun's Zenith is a powerful board wipe from the Scars of Mirrodin block that utilizes -1/-1 counters to weaken or destroy every creature on the battlefield. Unlike standard removal, this sorcery scales with your available mana and ensures that your deck remains stocked for the long game. Because it shuffles itself back into your library, it is a persistent threat that opponents must always account for.
Shrinking the Board
When you cast Black Sun's Zenith, you choose a value for X. Upon resolution, every creature currently on the battlefield receives X -1/-1 counters. This effect does not target, meaning it bypasses keywords like Hexproof or Protection from Black. Creatures with Indestructible will also be affected; while they cannot be destroyed by damage, they will die if their toughness is reduced to 0 or less by these counters.
Resolution and Shuffling
The spell follows a specific sequence: first, the counters are placed on all creatures. Immediately after, Black Sun's Zenith is shuffled into its owner's library as part of its effect. Note that if the spell is countered or fails to resolve for any reason, the shuffle effect never happens, and the card is placed in the graveyard like any other sorcery.
Common Mistakes
A frequent error is forgetting that Black Sun's Zenith affects your own creatures as well as your opponents'. Additionally, players sometimes forget that -1/-1 counters and +1/+1 counters cancel each other out. If a creature has a +1/+1 counter and you put a -1/-1 counter on it, both counters are removed as a state-based action.
When to Cast It
This card is ideal for dealing with wide boards of small creatures early in the game or for handling massive Indestructible threats later. Because it returns to the library, it is particularly effective in control decks that can reliably draw through their deck to find it again.
Interaction examples
You cast Black Sun's Zenith for X=5 to clear the board. As it finishes resolving, it shuffles into your library. You then cast Demonic Tutor to search your library, allowing you to find Black Sun's Zenith again and put it into your hand, ready to be cast a second time.
If you cast Black Sun's Zenith for X=10 and it kills a large creature, that creature is put into the graveyard. You can then cast Reanimate to bring that creature back to the battlefield. The creature will enter the battlefield as a new object without any of the -1/-1 counters that previously killed it.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Black Sun's Zenith
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
If this spell doesn't resolve, none of its effects occur. In particular, it will go to the graveyard rather than to its owner's library.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Doomsday + Commander's Sphere + Bolas's Citadel + Aetherflux Reservoir
- 1Cast Doomsday by paying
, searching your library and graveyard for Bolas's Citadel, Aetherflux Reservoir, two other cards with mana value 2 or less, and Black Sun's Zenith, and then placing the remaining cards on top of your library in the order previously listed and losing half your life, rounded up.
- 2Activate Commander's Sphere's first ability by tapping it, adding one mana of any color.
- 3Activate Commander's Sphere's second ability by sacrificing it, causing you to draw a card.
- 4Cast Bolas's Citadel by paying
.
- 5Cast Aetherflux Reservoir from your library by paying 4 life.
- 6Cast two other cards with mana value 2 or less.
- 7Aetherflux Reservoir triggers, gaining you 1 life for each spell you have cast this turn.
- 8Cast Black Sun's Zenith by paying 2 life and shuffling it into the library.
Legal formats
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Meta decks with Black Sun's Zenith
No archived Top 8 deck with this card yet.



Demonic Tutor
Reanimate


