horn/TrinityCore — comment on commit 14b2f3084246030f82e0a8b696764d494e053f4e
File: src/server/scripts/Northrend/Ulduar/Ulduar/boss_yoggsaron.cpp line 282
By horn:

Blame @Shauren, inspirated by his Necrotic Plague aura script (Lich King) :P he chose switch