Harbinger Boss

A datapack that adds a boss called “Harbinger” to your world.

He will not spawn naturally, but can be summoned by the player with a totem and a netherstar. All you have to do is throw both items together on the ground and the boss will be summoned.

Beware, he is quite strong and has many different attacks that destroy the environment. He will also only attack players and ignore mobs.

But I don't want to spoil too much here, so I'll let you try out this datapack for yourself.