This is a Datapack that adds a boss in the form of a giant zombie into the game!

It's summoned by making the structure in the picture (don't forget the iron axe)

It's a bit yanky... since the giant has no AI I had to experiment with other mobs to deal damage and walking, but it is what it is.

It drops a giant looting axe which is usually unobtainable.

There is an alternate version that uses a diamond axe instead of iron:
Diamond Downloads:

Datapack: https://www.mediafire.com/file/6hu2xwaw04pggy3/Giant_Boss_Datapack_Diamond.zip/file

Resoucepack: https://www.mediafire.com/file/xqsyl2pmkvm54n1/Gaint+Boss+Resourcepack_Diamond.zip/file