Open creatures, sealed powers and attachments
Main rulesetThe slot symbol on a creature determines whether the player may customize it with magic.
How it works
- Check the creature's slot symbol while building the deck.
- Assign at most one eligible attachment to an open creature.
- Treat a sealed creature's printed magic as fixed; it cannot accept an added attachment.
- If sealed magic is removed in battle, the host remains sealed rather than gaining an open slot.
Rules this mechanic controls
- An open creature can carry one prepared attachment.
- A sealed creature has one printed spell or trap and cannot receive another attachment.
- Removing sealed magic does not turn the creature into an open host.
- Attachment limits apply to the saved deck, not to every creature automatically.
Worked example
Two copies of the same open creature may be saved with different legal attachments, subject to deck limits. A sealed version already carrying a printed trap cannot be given another spell, even if that printed trap is later dispelled.
Limits and availability
Current status
Main ruleset
Where it appears
Deck construction and deployment.
Format rule
The selected match format is authoritative. If its setup screen disables this mechanic, its board control cannot activate it.
Related mechanics
Card magic
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