What the achievement asks
Kill ten different kinds of corrupted creature in Uldum or the Vale of Eternal Blossoms during Black Empire assaults. Ten points, account-wide, both factions.
Ten of the nineteen kinds, so half the list can be ignored.
| Creature | Creature | Creature |
|---|---|---|
| Corrupted Acolyte | Corrupted Assassin | Corrupted Beheader |
| Corrupted Bloodseeker | Corrupted Bonestripper | Corrupted Despoiler |
| Corrupted Dominator | Corrupted Doomsayer | Corrupted Fleshbeast |
| Corrupted Jailer | Corrupted Mind Eater | Corrupted Neferset Guard |
| Corrupted Observer | Corrupted Putrefaction | Corrupted Summoner |
| Corrupted Thaumaturge | Corrupted Thoughtstealer | Corrupted Tormentor |
| Corrupted Watcher |
Only during a Black Empire assault
None of these exist outside one. The other four assaults have their own enemies and none of them counts here, which is why this achievement can sit untouched for a week at a time while you play normally.
Ten different kinds means paying attention to names rather than killing everything in front of you. A hundred kills of the same acolyte is one criterion.
It costs nothing extra
Because you only need ten of nineteen, this finishes almost by accident during the assault you were doing anyway for It's Not A Tumor!, which wants a hundred tumors in the same window.
The one habit worth forming is to move on once a pack is dead rather than farming it. A varied route through the assault covers ten kinds in a single visit; a good farming spot covers two.