Rule 811.1.d
Some choices made while playing a card from Hidden are restricted to the battlefield where it was hidden. A card cannot be played from Hidden if it is a spell with no valid targets under these restrictions. See rule 355.6. Targeting for more information.
- 811.1.d.1 A hidden permanent must be played to that battlefield.
- 811.1.d.2 If a hidden spell or a play effect of a hidden permanent chooses any targets, those targets must be chosen from among…
- 811.1.d.3 If a hidden spell or a play effect of a hidden permanent causes you to play a unit, you must choose to play that unit…