Phoenix Feather

Cost: 1
Faction: Aceus/Yellow
Type: Scroll - Swift
Card Effect Text: 
Target a unit you control, it becomes rested & then, either its hp heals or, prevent its next source of damage. 

[Optional Cost]: Pay an extra gold; If you do, this gets the additional effect – “Target  an enemy unit on the front-line or kingdom. Move your unit to the front-line & it attacks the enemy unit but stays rested.” (This is an extra attack.)

Printings:
STZO/STZO SE (Set Zero)
MLVG/MLVG SE (Malverna's Revenge)
KGM (Kingdoms)
SE = Second Edition

Rulings:
1. STZO/STZO SE Printings of this card used to specify kingdom and did not force your unit to move to the front-line. 
2. This resolves as combat.