Siren's Call

Siren's Call is an area added in the Skills 2.0 update, being located on Petrichor V. The stage is a part of the fourth set of Environments in Risk of Rain 2.

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 Looping)
 * Wandering Vagrant
 * Magma Worm
 * Solus Control Unit
 * Solus Probe
 * Alloy Worship Unit
 * Solus Probe

Alloy Vulture Nests
Several Alloy Vulture Nests will spawn at random locations around Siren's Call. Destroying the eggs of a nest will drop healing orbs that heals for 40% of the player's max health.

Destroying 6 nests will spawn the Alloy Worship Unit, a boss unique to Siren's Call. Upon defeat, it will drop a legendary item for each player in the game (dead or alive) around the central pillar. The item dropped will be the same for all players.

The warning message "You hear a distant whirring" will appear in the chat upon destroying the 5th nest. Destroying a 6th nest will trigger the message "The whirring grows loud" and the spawn of the boss.

Players might want to be careful with their attacks, as a lot of items granting large areas of effect can easily destroy nests against their will. Examples of those items are, , , , or.

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.

Trivia

 * The internal development name for Siren's Call is Ship Graveyard.
 * Two broken probes can be seen blinking their eyes. The blinking reads, in Morse, "updog".