Splitter

The Splitter is the last monster/enemy in the game. He is encountered at Room 930 [updated 5/23/21]. He appears to be a floating fire orb that sends down lightning strikes. Splitter only drains about 10% of your health per hit. His ability is, as mentioned, summon lighting strikes in form of lines that when touch drains 15% of your health, they are constantly spawning and dodging may be hard in some scenarios like corners. The best way to avoid this is to run is zigzags, but still, it depends on luck and some accuracy.

Location
The Splitter is located in the Code Room, "Room 930", and comes out of the middle of the room. The music track "Sarpado" plays and the next room shows a big oven.

Hard mode changes
The splitter doesn't gain any abilities, he instead enhances his lighting strike ability, spawning more often and dealing more damage.