Yet Another Pixel Dungeon/Bosses

Boss 1: Goo

The boss will always appear on the top of the room once you open the locked chest in the center of the room
Is immune to mind and body effects, and is resistant to acid damage, but vulnerable to Banishment/Blessing

Has no armor, and will receive increased damage from physical sources while frozen

Receives increased damage from wands of Disintegration or any sources of electric damage
Will regenerate 1 point of health on every turn if it stands in the water

Goo will waste one turn to start its alt phase, giving you time to put some distance or to heal yourself

Base enrage duration is 5-10 turns, but it is doubled on second enrage and tripled on third
While enraged, Goo receives only half damage from all sources, but doesn't spawns minions on hit

While enraged, Goo will spread damaging miasma cloud around on every turn until exhausted
Miasma deals "body" damage, which means that it can be resisted with certain rings and armor enchants

Miasma is flammable just like grass tiles or corrosive gas, so it can be used against the boss

After enrage ends, Goo falls asleep and several additional minions appear on the top of the map

Amount of these minions depends on # of enrage (1-2/2-3/3-4 for the first, second and third times)

Goo will sleep until it recovers all of its health or is disturbed (by receiving damage or hearing a fight nearby)

Minions

Normally, every physical attack on the boss or its minions has a chance to cause another minion to appear
Such spawns of Goo appear with total health equal to the damage of the hit which caused them to appear

However, they will have only part of their health, but they can regenerate it while they are standing in the water
Chance for the minion to appear depends on damage inflicted (hits for 24+ damage will always create a spawn)
Wands of Magic Missile and of Avalanche deal physical damage, so they can cause minions to appear on hit
If minion recovers full health, it will become entranced and stop attacking you (it will start emitting black particles)

Entranced minions will try to approach the boss to be absorbed, healing it by the amount of their current health
Entranced minions are unable to dodge, which makes them vulnerable to backstabs

General info

Tengu will spawn in the random point of the main room once you enter there, same as in the original
Immune to mind effects, and resistant to body effects
Attacks from distance, occasionally teleports around the room
Teleports every 8 attacks, but this counter is increased every time he's damaged
Activates some of the deactivated traps on the arena every time he teleports

Alternative phase

Tengu will waste one turn when enraged, so run away and/or heal
Enrage lasts 2.5-5.0 turns, but will be doubled on the second enrage and tripled on the third
While enraged, attacks twice as fast and can inflict very serious damage very quickly
Teleport counter is increased on every Tengu's turn, so it will teleport more often

Tips

A Scroll of Darkness doesn't just helps you hide when Tengu is enraged, but also may make him step onto his own traps and die quickly.
Throwing potions help chip at his health quickly.

General info

DM-300 will spawn in the random point of the main room, same as in the original
Deals significant damage and has quite high armor class
Immune to Body/Mind debuffs as any unnatural mob, but also immune to Banishment/Blessing
Resistant to fire/unholy damage and being frozen

Moves only at 75% speed normally, so it is possible to kite the boss
Heals itself for a 20% of missing health when stepping on a trap while not enraged

Alternative phase

Base enrage duration is 8-12 turns, but it is doubled on second enrage and tripled on third
While enraged, its damage is doubled and it starts moving at 100% speed, so it is better to run
Every move will generate avalanches on two random tiles near it, these can damage and stun you
Traps will not heal DM-300 while it is enraged, so running away is encouraged

Tips

Using a Scroll of Raise Dead is more than enough to kill this boss. If you don't have one, kite the boss and attack it at range. Alternatively, you can choose to melee it with your weapon while it's calm. Regardless, it is NOT recommended to attack it while enraged, as you may be paralyzed and killed instantly.
Don't let it move over traps, or else your hard work will immediately be undone. As stated above, the DM-300 heals 20% over traps, so think about where to step next. You don't have any time limits, so don't be afraid to think slowly.