Wolf Rider's shadow effect states:
"Wolf Rider attacks the defending player. That player may declare one chracter as a defender. deal Wolf Rider its own Shadow card. After combat, return Wolf Rider to the top of the encounter deck."
My Q is about the phrase 'after combat'. Does this mean at the end of the combat phase, or after the single combat resulting from the fact that Wolf Rider attacks as per its shadow effect?
If the first, it is possible to attack Wolf Rider, kill it and send it to the discard pile before the last bit of its shadow effect kicks in.
If the latter, Wolf Rider will be back on top of the encounter deck after the player has defended its attack, and can therefore not be targeted by a player attack.
Mind you, with all the other nasties in the encounter deck, the second option may actually be preferable.