Riftbound Hidden: what it does
GlossaryHidden is a Riftbound keyword on Spells, Units and Gear that lets you pay a cost to hide the card facedown at a battlefield you control, on your own turn. From the next turn onward, that facedown card gains Reaction and can be played for free, ignoring its normal cost — turning it into a surprise play your opponent can't see coming or plan around.
How hiding and playing from Hidden works
While a card with Hidden sits in your hand or Champion Zone, you may pay its Hidden cost to hide it facedown at a battlefield you control that doesn't already have a hidden card there. It stays there — hidden information, not a public commitment — until you choose to play it, which you can do from the next turn onward at any time a Reaction card could be played, for [0] rather than its printed cost.
The targeting restriction, and why it matters
A card played from Hidden that targets something (or is a permanent whose own play effect targets something) is generally restricted to targets at the battlefield it was hidden at — the game already committed that card to a location the moment it went facedown. That's the tradeoff: total surprise on timing and identity, in exchange for a fixed location. Ambush is the natural partner — see the Timing Keywords guide for how the two set up bluffs together.
Momentary Companion is a real, officially revealed Radiance card printed with Hidden — open it to see the exact printed rules text and its live price across stores.
Every Hidden card
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Hidden FAQ
What is Hidden in Riftbound?
Hidden lets you pay a cost to place a card facedown at a battlefield you control; from the next turn on you can play it for free, at Reaction speed, without your opponent knowing what it is until it resolves.
Can you play a Hidden card the same turn you hide it?
No — a hidden card gains its Reaction permission and free cost starting the turn after it was hidden, not immediately.
Does a card with Hidden have to be hidden?
No — it's optional. A card with Hidden can always be played normally for its usual cost and timing instead.
Are there restrictions on what a Hidden card can target?
Often, yes — most targeting from a card played out of Hidden is restricted to the battlefield it was hidden at, since that's the location it was already committed to.