Niflheim's Cursed Emblems

I picked up a mod I was working on some time back, put it some missing things, and decided to post it to the community. The mod gives you access to Cursed Emblems, which are custom challenges. There are three trophies, one for regular, one for hardcore, and one for extreme. You get these trophies upon completing the final advancement in the trophy line (regular line, hardcore line, extreme line). These are the current Cursed Emblems:

Fragile (Initial Release): Cuts current max health in half.

Arrogant (Initial Release): Disallows the use of shields. If a shield is in either hand, it gets deleted from the inventory.

Motivated Creepers (Initial Release): All creepers in a 15 block radius gain Speed 3.

There's also a storage item for the cursed emblems, so they don't burden your inventory.