Rules FAQ:
- 'Move power' and 'gain power' are different game terms. Grenn will not trigger Ser Edmure Tully.
Grenn is also not affected by #King in the North
—
JaqenHghar
41
Ranger.
No attachments except Weapon.
Reaction: After you win a challenge in which Grenn is attacking, move 1 power from the losing opponent's faction card to another attacking character. (Up to 2 power instead if that character is standing.)
Link: Decklists
Rules FAQ: