Druidic Dire Familiar Spectre can summon infinite Rat minions

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Alfabetica wrote:

The skill Druidic Dire Familiars use to summon 12 rats that can only be used once by default resets when you summon new Spectres or leave and re-enter the instance. These rats don't despawn. The 3.15.1 patch that just happened fixed this for one of the other expedition mobs that had a similar bug.

Anyway here's a quick video of this bug in action.