Cards And Zones
Where and When Can You Play a Unit with Ambush?
Ambush lets you play a unit to a battlefield where you control units, with Reaction timing for that play.
RiftPal explanation · Answer first
The short answer
AmbushPermission to play a unit to a battlefield where you control units, with Reaction timing when playing it there. Other play requirements still apply, and Ambush alone does not make the unit enter ready.View in Glossary lets you play the UnitA permanent type with Might that can take damage and use Standard Move. Units normally enter the board exhausted. A unit card outside the board keeps its type, but effects must be able to affect its zone.View in Glossary to a BattlefieldA Battlefield is a shared location that players compete to control during the game.View in Glossary where you control units, using ReactionA timing keyword that includes Action's permissions and also permits a card or activated ability while a Chain is waiting. You still need the proper opportunity, normally Priority; it does not allow an interruption halfway through resolution.View in Glossary timing. It does not make the unit enter ready or give it Reaction timing when played to your Base.
RiftPal explanation
How it works
Card reference
Inferna
You still pay its costs and follow other play restrictions. Your normal options for playing the UnitA permanent type with Might that can take damage and use Standard Move. Units normally enter the board exhausted. A unit card outside the board keeps its type, but effects must be able to affect its zone.View in Glossary remain available. Card text can change AmbushPermission to play a unit to a battlefield where you control units, with Reaction timing when playing it there. Other play requirements still apply, and Ambush alone does not make the unit enter ready.View in Glossary 's permissions.
Unit
Inferna
[Ambush] (You may play me as a [Reaction] to a battlefield where you have units.) [Assault 2] (+2 [Might] while I'm an attacker.)
The chosen BattlefieldA Battlefield is a shared location that players compete to control during the game.View in Glossary must remain legal as you finish playing the UnitA permanent type with Might that can take damage and use Standard Move. Units normally enter the board exhausted. A unit card outside the board keeps its type, but effects must be able to affect its zone.View in Glossary . For example, if paying a cost removes the last unit there, AmbushPermission to play a unit to a battlefield where you control units, with Reaction timing when playing it there. Other play requirements still apply, and Ambush alone does not make the unit enter ready.View in Glossary no longer permits that location; another permission would be needed.
In practice
Example
You have Priority during a Chain and control a unit at a battlefield. You may play an Ambush unit there. It normally enters exhausted.