This is a list of enemies that drop Tier Thirteen Alternate Weapons.
Sort order is alphabetical, ignoring descriptors where it would separate otherwise similar enemies, and ignoring articles, except for any ‘groups’ (eg. Dungeon Bosses) which go first.
The enemies are:
Killer Bee Queen
Crystal Worm Mother
Crystal Entity
Factory Control Core
Twilight Archmage
The Wanderer (Interregnum)