Void Keepers

Void Keepers is one of the encounter types in the Altars of Summoning activity, which appeared in Season of the Witch in Savathûn's Throne World. Void Crystals appear and bring a flood of Screebs. The fireteam shatters the crystals to expose the Imprisoned Abominations inside, then defeats them. Dkurzii, Plague Spreader then arrives and must be defeated.

The encounter's objectives give three paths: destroy the crystals to slow the Screebs, eliminate the Abominations once they are vulnerable, or defeat an Imprisoned Abomination to collect its tithe.