If you try to hit honor the dead while your reticle is on someone in mist form, you will get "target is immune" and be unable to cast it.
If you try to hit honor the dead while your reticle is on someone in mist form, you will get "target is immune" and be unable to cast it.
People in mist form are immune to healing, so it does make sense for it to appear in those cases. I know Breath of Life hits a different target if the first person it tries to heal is in mist form, after a 1s delay or so. Not sure why shards don't get fired though, the "target is immune" is probably referring to the stun (people in mist from are immune to Crowd Control after all), but you should still be able to hit them with shards.