Creeper Pants

Creeper Pants are Leggings unlocked at. It grants the wearer similar abilities to a Creeper, creating an explosion around you when at low health.

It's also part of the secret Monster Hunter / Raider set.

Stats

 * +200
 * +65

- Causes an explosion when dropping below 20.0%, damaging and knocking back all monsters around you. Cooldown: 60s

Note that you don't actually have to be at 20% for the ability to activate; sometimes it activates at 50%.

Crafting
The Creeper Pants requires to craft, which can be bought for  off the Bazaar.

Trivia

 * The Creeper Pants are another reference to the Hypixel minigame Mega Walls. In Mega Walls, the Creeper class's main skill is to activate an explosion that causes massive AOE damage (Detonate). Also, the Creeper's signature kit item is it's diamond leggings.
 * The ability can affect other players, but the knockback other players take from it is very low.