S.A.H.A.B.A.R.

Ranged attack: hits for 315 damage, up to 20 tiles away, every 6 to 10 seconds.

It puts these on the ground:

Bullet Hell Projectile

Mortar shot: hits for 512 damage, 10 times per use, up to 20 tiles away, every 11 to 16 seconds.

Winds up for over two seconds then fires rings of shots every six seconds, eight of them spread evenly, or four on the compass points, or four on the diagonals.

It puts these on the ground:

Bullet Hell Projectile

Charges up for two seconds then fires one heavy shot that takes three seconds to play out.

It puts these on the ground:

Robot Boss Large Projectile

When enraged it lobs four to six void mortars onto the floor.

It puts these on the ground:

Robot Boss Void Mortar Projectile

Lobs six to ten fire rockets onto the floor.

It puts these on the ground:

Robot Boss Fire Rocket Mortar Projectile

Slams out a shockwave that pushes everyone back when it stands up, when it finishes a chain of attacks and when it collapses.

It puts these on the ground:

Robot Boss Attack Pushback

Walks on four legs that smash every tile within two tiles of each footfall, and it moves faster on a broken leg than a whole one.

It puts these on the ground:

Robot Boss Leg

Enrage starts when its health falls to 50 percent.

When it enrages it stands up over seventeen seconds, changes its music and pushes everyone back.

Break all four legs and it collapses for ten seconds, becoming hittable after the first two.

Below sixty five percent health it sheds mechanical and scrap parts around it each time it collapses.

Enraged and below twenty percent health its heavy shot winds up faster and fires sooner.

It gets back on its feet once the ten seconds are up, or sooner if it is above eight percent health and has lost a quarter of its health while down.

If it falls into lava it loses two thousand health every second until it climbs out.