User blog comment:Lablabdi/The Guardian Cloak/@comment-5007614-20141021152151

It didn't work for me against Karl. I had my Level 12 Oulu equipped with it. Karl would only do 1 damage per hit, but Oulu could not do enough damage to Karl to negate his healing. I think the game would have gone on forever. I didn't realize Karl was healing, so after a half-hour of auto-battle, I made Oulu defend EVERY TURN so that it would stop healing with Heart Crystals and let Karl whittle him to death. After over 30 turns of defending, Oulu died and my next team finished up Karl.

The Guardian Cloak did not work :P