My log shows entries for the party's DC damaging me with my Aura of Courage;
eg: [Combat (Self)] (DC) deals 1903 (9514) Radiant Damage to you with Aura of Courage.
Seen with 2 different DCs.
That's not a lot of damage but at the wrong time that can be a killer.
Obsidian Moonlight - Paladin
Obsidian Oath - Warlock
A whole lot of other Obsidian toons as well.
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