[Mechanics and Playability Bug] Face down cards largely unplayable

[lgray]

Card(s)

Nearly all cards with facedown mechanics

Build/version

latest

Game mode

AI

Actual behavior

transcript from Aurora on discord follows:

well i cant zip the gamestate on mobile so i cant provide that atm. But heres a couple of issues i can provide (cant test if the mechanic is rules accurate since it doesnt work)

Cards cast fast down must have the corresponding reminder card so its distinct how they were cast facedown (see last point for more info)

You cant pay the cost to actually flip them faceup if they have one

Players that control a face down card cant see what they are

if someone controls Multiple face down spells or face down permanents they must be easily differentiated from each other AT ALL TIMES. This includes but is not limited to: Knowing what ability or rules caused the permenants to be face down, the order spells were cast, the order that face down permanents entered the battlefield, which creature(s) attacked last turn, any other differences between face down spells or permanents. (basically u cant group them, and u have to be able to know which card are from what and when)

Expected behavior

Face down cards should be playable and clear to play.

Steps to reproduce

Play a card with face down mechanics face down.

Logs/screenshots/game-state

Will attach later.

[mike-theDude]

Triage analysis

Clarified summary
Face-down gameplay is broadly unusable: controllers cannot identify or turn up their own face-down permanents, and multiple face-down objects lack the visible provenance and ordering needed to keep them distinguishable.

Reproduction status
Confirmed at the subsystem level. #4381 already isolates two of the reported failures: the client masks engine-provided identity from the controller and exposes no TurnFaceUp dispatch even though the engine action exists. This report also adds the distinct requirement to preserve visible provenance/order among multiple face-down spells and permanents.

Likely scope
Frontend rendering and actions for face-down objects, consuming engine-provided viewer-specific identity and stable public distinctions without revealing hidden information to opponents.

Acceptance criteria

• A controller can identify each face-down permanent they are allowed to look at; opponents still see only public information.
• Legal morph, megamorph, manifest, disguise, and cloak turn-face-up actions are available and dispatch the engine action.
• Multiple face-down spells and permanents remain individually distinguishable by all public rules-required history and provenance.
• The UI indicates which face-down method or associated reminder representation applies without leaking the hidden card identity.

Related issues
#4381 exactly covers controller visibility and the missing turn-face-up action, but not all of the provenance/differentiation requirements recorded here. The issues overlap and should be implemented together, but this report is not closed as an exact duplicate.

[mike-theDude]

Classifier analysis

Verdict: not_card_data_attributable

Matched clause: (none) (supported: n/a)

Reasoning: The report concerns generic face-down object visibility, UI actions, and public differentiation across many mechanics. It is not attributable to the parsed Oracle clause of one card.

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Posted by bug-coverage-classifier skill.