History of Caught in the Vortex

Caught in the Vortex is a Hunter triumph: "As a Nightstalker, get kills with Vortex Grenades."

How to complete

Equip Nightstalker and use the Vortex Grenade, then land kills with it (the kill count is not confirmed in sources I opened). The D2 Wiki describes a same-named Guardian Games daily bounty (Season 10) requiring 10 grenade final blows with Vortex Grenades, for Voidwalker or Nightstalker, noting that Crucible kills against other Guardians were the most efficient. That is a different, older item; the triumph here may have different counts. Practical tip: use grenade-focused builds and fight clusters of enemies, or Crucible.

Seal and reward unconfirmed.