Siren's Call

Siren's Call is an area added in the Skills 2.0 update. It features what appears to be long-abandoned ancient technologies stuck in a Titanic Plains-esque landscape. This is the only area where the Alloy Worship Unit, a stronger variant of the Solus Control Unit, can be found in.

Monsters

 * Jellyfish
 * Beetle
 * Alloy Vulture
 * Brass Contraption
 * Greater Wisp
 * Elder Lemurian
 * Void Reaver (only after the first Loop)
 * Wandering Vagrant
 * Magma Worm
 * Solus Control Unit
 * Solus Probe
 * Alloy Worship Unit
 * Solus Probe

Newt Altars
The Newt Altars can spawn at several locations on Siren's Call:
 * 1) Behind the arc near the obelisk where the Alloy Worship Unit spawns.
 * 2) Spike/Stalagmite in cave (there are a few including one vertical one you can jump on to access it)
 * 3) Atop of the hanging crate.