Mushroom Golem

The Golem is one of the three bosses to spawn in The Forest.

Behavior
It can't jump too high and it's usually not too mobile until it starts spinning. The Golem also harms any other enemies (besides the smaller golems) with its spinning and jumping attacks.

Strategy
Don't try to fight it while it spins, preferably stand behind a wall and try to hit while it's standing still. Freezing it can temporarily immobilize the Golem even while it is spinning, but it will continue on the same trajectory once it unfreezes.

A good counter is the wand of digging(if you have one), which deals 25 damage per charge.

Boulder protection will prevent the player from being squashed to death.

Extraordinarily dangerous on ledges above the player without boulder protection due to the instant death squashing mechanic. Though, this mechanic will kill other enemies, as well as damage enemies with its other attacks besides the boulder.

Typically, the Golem will be forced to remain on the ground floor of the Forest dungeon. Ranged attacks work well, as its movement, when not spinning, is very slow and its boulders only go so far. Arrows or long distance spells work well.

Fighting the Golem in an area with many platforms above him is best as the player can jump up out of reach of attacks, gaining distance, and dropping back down to damage the Golem. Be careful though, as the Golem's Spin attack can make it bounce high up onto platforms above, so moving to a fairly high platform is safest.

Further, despite looking extremely large, the Golem can spin through a space that is only 1x1. (Tested when using a Wand of Digging that destroyed terrain of 1x1 blocks. The Golem revved up his Spin and spun through to the other side.)

Champion variant
The champion variant has a yellow coloration, and possesses a new attack tied to its spin.

When the boss finishes spinning, it will locate the nearest player then fly above them before dropping straight to the ground, creating shockwaves. The player will be hit for 999 damage if the boss lands on them.