Malus

Malus is the sixteenth and final colossus of the game Added by Woozey. He resembles a sorcerer and is the largest and most powerful colossus in the game. Due to Wander's exhaustion from previous battles, the loss of his long-companioned horse, and the somber timbres of Mallus's battle music, the battle is considered the most emotionally impacting.

"The Monolith"

Walkthrough
Malus is the most time consuming of all the colossi by far. One of the most difficult aspects of Malus is simply reaching him. He stands in the center of a huge dais covered with small monoliths and bunkers. From his hand he shoots what can be best described as an energy blast at Wander.

Because of this, you need to dart from cover to cover before he can hit you. Start by moving up to the column ahead, which should provide protection. When he's fired move right of it behind some rubble. Continue waiting for him to fire and running right until you are able to jump down a tunnel. From here it's fairly straight forward and you simply need to repeat this in something of a zig zag fashion until you come up from a hole underneath Malus' legs. If at any point the energy blasts hit you (he can reel them off pretty quickly) you will be blown backwards a fair distance, as well as losing nearly a third of your health and being concussed for a pretty long time. The closer you get, the harder it is to get between safe spots.

From this point on the only thing that can really hurt you is falling from Malus, who is quite massive. Walk around to the back of Malus and begin to climb his stone tasset. Continue climbing to the exposed fur at the small of his back. It's quite a long climb. When you reach the fur, climb on and stab him.

Malus' hand will come around to inspect the damage. Jump and grab onto the fur on his hand and wait until it swings around in front again. You can attempt to climb up his hand whilst he brings it back around to the front. It is important to be careful at this point: Malus will frequently attempt to shake you off his wrist, and being thrown from this height can be fatal. In between his attempts to flick you off, he will repeatedly turn his hand to look at you, which makes climbing off rather difficult. Run up his forearm the moment you're on top of the hand and your path looks stable, and grab onto his bicep. Stab him.

This part is very likely where you will sustain damage, as his right hand comes around to inspect the damage on his bicep. The jump to it must be placed very carefully, or else you'll fall. From this height, you can lose half your health instantly from the fall, not to mention having to go through the ordeal of climbing Malus' tasset again. Wait until his hand has resumed its previous position and stab it repeatedly. He will now hold it still, which will give you both an opportunity to regain stamina and proceed to the next part of his body. Draw your bow and shoot him in the left shoulder. Use the sword to pinpoint the exact spot. Hold on.

Malus will move his right hand to cover his left shoulder. Jump off and climb from his shoulder, to his back, and finally up to his head. This is the only place where you can do any real damage to Malus, but it is very difficult to place a hit. Do not focus on charging up a very strong stab. He thrashes too frequently and you will always be interrupted. Instead, many quick stabs will make this go by much farther. If you're finding yourself low on stamina, hope you have enough left to wait until Malus stops thrashing, then work your way down to his shoulders, which are far more stable to allow yourself to rest. In-between thrashes you have quite a long time to rest. Eventually, you will have done enough damage and Malus, the final colossus, will fall. It's all over...

Location
To find this colossus, you have to go past the opening where you found Kuromori and then head to a large door in the open door, using the sword if you get lost. Soon enough, you will reach a large door with a hole to fit your sword's light into. This has the the distinction of being the only colossus site you can't reach before you have to fight it, because the sword has to point all of its light to the door's direction to the last boss.