Omoroth the Sea Titan

It puts these on the ground:

Octopus Boss Projectile

Rises to the surface when somebody fishes at its spot with the right bait, and stays committed to the fight for at least ten seconds.

Sinks below the water once it is out of combat and back at full health, and will not come back up for ten seconds.

Fires a volley of projectiles from range every three seconds, with a quarter of a second between shots.

Stops shooting and plants tentacles in the water two to seven tiles from each player within twenty tiles, three each when you fight it alone and fewer each in a bigger group, never more than eight at once and never more than fifteen on the field.

It puts these on the ground:

When enraged it fires every second instead of every three, its shots fly twenty percent faster, and it plants one more tentacle for each player.

Phantasmal Echo-Mapx1

Not dropped once this map has been scanned in the world.