Fear of Infinity 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
Flying, lifelink This creature can't block. Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, you may return this card from your graveyard to your hand.
Complete guide
Fear of Infinity is a resilient Nightmare that keeps coming back from the dead to haunt your opponents. As an Enchantment Creature with flying and lifelink, it serves as a persistent threat that rewards you for playing other enchantments or exploring Rooms. While it cannot block, its ability to return to your hand makes it a difficult threat for opponents to permanently answer.
The Persistence of the Eerie
Fear of Infinity features the 'Eerie' keyword, a triggered ability that monitors two specific events: an enchantment entering the battlefield under your control, or you fully unlocking a Room. When either of these happens while Fear of Infinity is in your graveyard, the ability triggers, allowing you to return the card to your hand. Note that if Fear of Infinity itself enters the battlefield at the same time as other enchantments, its ability will trigger for each of those other enchantments, though the trigger only functions if the card is in the graveyard when the event occurs.
Unlocking the Grave
To 'fully unlock' a Room, you must unlock a door while the other door of that Room is already unlocked, or unlock both doors simultaneously. Each time this happens, Fear of Infinity can return to your hand. Because the ability uses the word 'may,' you are not required to return it if you prefer to leave it in the graveyard for other synergies, such as reanimation or delirium.
Combat Limitations and Lifelink
Despite its evasive Flying keyword and ability to gain life through Lifelink, Fear of Infinity has a significant restriction: it can't block. This means you must use it aggressively to pressure your opponent's life total or to gain life back, as it will never be able to protect you from incoming ground or air attacks.
Interaction examples
If you have Roaming Throne on the battlefield and you chose 'Nightmare' as its creature type, Fear of Infinity's Eerie ability will trigger an additional time. If you cast an enchantment while Fear of Infinity is in your graveyard, the ability triggers twice; however, once the first trigger resolves and Fear of Infinity returns to your hand, the second trigger will do nothing as the card is no longer in the graveyard.
If you control Fear of Infinity and cast Solemn Simulacrum, the Eerie ability will not trigger. Because Solemn Simulacrum is an Artifact Creature and not an Enchantment, its entry does not satisfy the requirements for Fear of Infinity's graveyard recursion. Fear of Infinity only cares about the Enchantment type.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Fear of Infinity
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
If a permanent with an eerie ability enters at the same time as one or more enchantments, its ability will trigger for each of those enchantments.
No other card is named in this ruling.
- #2· Wizards of the Coast
An ability that triggers "whenever you fully unlock a Room" triggers when a door becomes unlocked and the other door of that Room is already unlocked, or when both doors of that Room become unlocked simultaneously.
No other card is named in this ruling.
Legal formats
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Meta decks with Fear of Infinity
No archived Top 8 deck with this card yet.



Roaming Throne
Solemn Simulacrum