Tales of Kenzera: ZAU

After defeating Gagorib in Act III, your quest will update. This is where Act IV begins.

When you revisit Patakatifu (where the story started), you'll be warned that the next step is a point of no return. Be sure you've collected everything you intended to... if you are trying to complete the codex then you should only be missing one location entry. Speak to Kalunga when you're ready and travel to The Realm of the Dead.

There are no enemies and no secrets in this area, so platform your way through until you reach Kalunga. Chat with him and it turns out that we need to perform one last task as shaman, so we find ourselves in a boss battle. The boss has four stages:

1. Summons masks around himself, sends masks to attack you, sweeps across the stage to attack you, and summons basic enemies. I found it difficult to target him with the sun mask in this stage, so I used perfect reloads with the moon mask to do damage. When you do enough damage (about 2 bars) he will fly away and switch masks.
2. Mimicking Impundulu, he will summon lightning bolts (keep dodging these) and move to the sides of the stage to attack with lightning beams (dash through these). I tried both ranged attacks with the moon mask and melee attacks with the sun mask (after dodging through a lightning beam) and both seemed alright. When you do enough damage he will fly away again and switch masks.
3. Mimicking Kikiyaon, he will summon platforms to lead you up into the sky while launching masks that track you. Once you reach him, this is a great chance for lots of melee damage from the sun mask. When you do enough damage, he will fly away again and switch masks one last time.
4. Mimicking Gagorib, he will summon fireballs to dodge, boulders to LT + B dash through, and fly off the screen to come crashing down on top of you. I didn't have any great opportunities for melee here, so I just hit him with a Lunar Blast to finish the battle off.

Dialog, dialog, dialog... but your achievement should pop during the credits.