Baron Opal II
Legend
Yes.From the sanctuary spell:
If the warded creature makes an attack, casts a spell that affects an enemy creature, or deals damage to another creature, this spell ends.
What exactly is meant by "deals damage to another creature"?
If I am a Rune Knight and I make an enemy redirect an attack, does that count as me "dealing damage"? How about if a Runke Knight has someone in Fire Rune shackles and takes damage at the begining of a tunr. What if I am concentrating on a wall of fire and an enemy walks into it? How about if I am concentrating on crown of madness and I make the charmed creature attack someone?
Do these count as me "dealing damage"?
I've interpreted the RAI as you exchange the ability to hurt others so that others can't hurt you. This allows you to move about the battle field, heal, or perform other actions that don't inflict any kind of damage. It's uncommonly used at my table, but when the cleric needs to be way over there, right now, that spell sees use.