The King of Twilight

Mod for White Shrimp's Great Adventure Modpack.

Add the final boss of Twilight Forest.

The added boss, The Twilight Lord, uses various spells across six stages.

The Twilight Lord is spawned on the top layer of the Final Castle.

and use Twilight Tweaks mod to spawn boss, it will not spawn with only this mod. 

[summon twilightforestfinalboss:twilight_lord]

Put this command in the config of Twilight Tweaks to spawn boss.

You must also install Iron's Spells 'n Spellbooks and Geckolib