Bind Wounds

Getting ready to play Beyond the Wall as an online game and I'm thinking of playtesting a new rule idea.

  After combat, if the character spends 1 turn(10 rounds) binding his wounds(which requires materials to do that) he recovers all HP lost during the combat. There are two downsides to this however:

• He takes a -1 penalty to all rolls. This is cumulative.
• Heavy exertion requires the character to make a save or suffer 1 damage. This damage may not be bound.

  These penalties disappear after a full night's rest, though the damage done by reopened wounds must be healed through natural healing, the healing skill, or magic.
  Someone using the healing skill might provide a bonus on the damage save.