ULB-278 (also known as Billy Heeler by the community and by the April Fools Update) is one of the clones A-278 spawns in its sequences. Because of its mechanic, it (and TLAB-278) are more dangerous than the regular clones.

ULB-278, like the rest of the A-278 clones, appears out of portals on the wall and aimlessly roam around Section A. However, the unique ability it has is to check blue lockers and will pry them open if a player is in one. If it finds a blue locker housing a player, it will ki