This is something I ran into today as well. The stat bonuses on it seem crazy good for late game but I'm having a hard time justifying it both thematically and mechanically. It doesn't make sense from a roleplaying perspective and it feels too prohibitive having to chase after whoever is being attacked to try and give them the effect.
It could still be viable though. Once you start stacking defenses it gets super valuable as you approach 100% resist and dodge. I might pump it for a sidekick I don't normally use just to try it out, but I wouldn't be surprised if they are already planning on tweaking it.
