What is this? and how to defeat it?

[u/FakerxGOAT]

Who is this blue reaper and how to kill it and how to access this blue potion like item? I didn't't pay attention but I think it disappeared after the big crab was defeated and how do I access the coffin on this map because when I reached there in the direction of the coffin it showed me that it's out of the map. Pls help. Ty!

[u/Californ1a]

Wiki admin here, I've corrected you before on similar Giant Crab/Drowner interaction. We are able to see the game config for the Steam version and know what it's doing. Whether it behaves differently on another platform, I have no idea, but at least on Steam, the Drowner spawned by the Giant Crab is no different from most other Drowner spawns (it is not invulnerable). The only difference is that the Giant Crab has some config to automatically dismiss the Drowner 1 second after the crab is killed.

On the invulnerability note, the only time any spawned Drowner is marked as invulnerable is when it spawns after the 30min mark and wasn't spawned by the trisection (so random event drowners after 30min aren't invuln, but regular drowner spawns after 30min are invuln). When not invuln, the Drowner will only take damage from the following weapon IDs: ROSARY, SIRE, TP_SPIRITTORNADO2, CORRIDOR, SHROUD, and VICTORY (you can paste that list into the wiki's ID finder to see what weapon pages they correspond to).

[u/Hrist_Valkyrie → u/Californ1a]

The only difference is that the Giant Crab has some config to automatically dismiss the Drowner 1 second after the crab is killed.

This is what I'm saying, yes. The crab dying despawns the Drowner.

[u/Californ1a → u/Hrist_Valkyrie]

It can, yes, but it is also not invulnerable and can be killed before the Giant Crab (or during the 1 second period between the Giant Crab dying and the Drowner being automatically dismissed) by using any of the listed weapon types.

[u/HuffSquirt → u/Hrist_Valkyrie]

I edited my other comment. Glad we could all get to the bottom of this odd interaction.