Pyrdra the Fire Titan

Melee attack: hits for 293 damage, up to 5 tiles away, every 1 to 3 seconds.

Mortar shot: hits for 150 damage, 7 times per use, up to 30 tiles away, every 2 to 3 seconds.

It puts these on the ground:

Hydra Boss Beam Mortar Projectile

Beam: hits for 381 damage.

Burst out of the ground: hits for 88 damage, every 8 to 14 seconds.

Shockwave: hits for 615 damage.

Stalactite mortar: hits for 234 damage.

Throws nine blobs of lava one a second in a line running from itself past you, scattered sideways, and they will not land on water or pits.

It puts these on the ground:

Hydra Boss Lava Mortar Projectile

Nilipede mortar: hits for 293 damage.

Sleeps underground until the bait for its own biome is dropped within three hundred tiles, then races to it, swallows it and blows a three tile crater open to start the fight.

Dives underground once a player is within thirty tiles, tunnels to one of five fixed spots tearing a two tile wide trench through the ground, then bursts out and smashes everything within two tiles.

Stays underground and cycles between fixed patrol points while nobody is fighting it, wearing a shield worth thirty percent of its health that fills itself back up.

Winds up for three seconds then fires a beam that starts two tiles in front of its mouth and crawls toward you, laying a new burning segment every fifth of a second and speeding up ten percent with each one, thirty segments from a single head and five fewer for every extra head.

It puts these on the ground:

Hydra Boss Beam Mortar Projectile

Bites at anything standing right in front of its head once the fight has started.

It carries a shield worth thirty percent of its health, and the soft spot in front of its mouth only opens once that shield is gone.

If every player gets a hundred tiles away it goes back to sleep and the fight resets.

Pyrdra grows two extra heads, a nature head and a sea head, one every second, each with its own shield and its own crater.