Zellix, Sanity Flayer is a Magic: The Gathering card, a mythic rare blue legendary creature from Commander Legends: Battle for Baldur's Gate (CLB), a draft-focused set released in June 2022. It is collector number 652 in that set, with art by Slawomir Maniak. It costs {2}{U} (two generic and one blue mana) to cast, for a mana value of 3. It is a 2/3 creature. Its colour identity is blue. It is legal in Legacy, Vintage, Commander, Duel Commander and Oathbreaker. It has been printed in 2 sets, from The List (2020) to Commander Legends: Battle for Baldur's Gate (2022). It can be your commander. The latest aggregated market price for this printing is $4.67 (normal finish, as of 2026-08-30).
Card text
Hive Mind - Whenever a player mills one or more creature cards, you create a 1/1 black Horror creature token.
{1}, {T}: Target player mills three cards.
Choose a Background (You can have a Background as a second commander.)
Market price
Latest aggregated market price for the normal finish of this printing: $4.67 (as of 2026-08-30).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of Zellix, Sanity Flayer by format. Formats in which it is not legal are not listed.
Zellix, Sanity Flayer has been printed in 2 sets. The other printings are listed newest first, with the rarity and release year of each.
Printing
Rarity
Year
The List (PLST) #CLB-652
Mythic
2026
Commander Legends: Battle for Baldur's Gate (CLB) #619
Mythic
2022
Official rulings
The 8 most recent official rulings for Zellix, Sanity Flayer, newest first.
Choose a Background is a variant of the partner ability. You may have two commanders if one of them is a legendary creature with the choose a background ability and the other is a legendary Background enchantment. Backgrounds and cards with choose a Background do not interact with cards which have any other partner ability.
You can choose two commanders that are the same color or colors.
If your commander loses the choose a Background ability or stops being a Background during the game, as appropriate, it is still your commander.
If your Commander deck has two commanders, you can include only cards whose own color identities are also found in your commanders’ combined color identities.
If you control a Background that grants an ability to commander creatures you own, and you own more than one commander creature, each of them will have that ability.
If a card refers to a commander creature you own, a Background won't usually be counted or included for that effect. If another spell or ability causes your Background to become a creature, however, it will be included. Any effect that refers to your commander or a commander you own or control without specifying creature will apply to a Background that is your commander, as appropriate.
Once the game begins, your two commanders are tracked separately. If you cast one, you won’t have to pay an additional {2} the first time you cast the other. A player loses the game after having been dealt 21 combat damage from any one of them, not from both of them combined (although your Background won’t usually be a creature anyway).
If something refers to your commander while you have two commanders, it refers to one of them of your choice. If you are instructed to perform an action on your commander (e.g. put it from the command zone into your hand due to Command Beacon), you choose one of your commanders at the time the effect happens.
Similar cards
Other creature cards with a blue colour identity, ranked by how often they appear in Commander decks.