New Boss: Fenrir

Minecraft really needs a new boss. Fenrir is a giant wolf from Norse mythology. He would spawn on a small island covered in a new purple flower: heather (this can't be built, it's just where he spawns, only one of these islands spawn in the world). Once you come close to his island, he will disable your elytra or break your boat and drag you ashore. He will break any block you place and drag you back onto the island if you try to escape. He has 3 attacks: biting, swiping at you with his claws, and pinning you down (this attack activates if you avoid doing damage to him, try to escape, or place blocks, he immobilizes you and deals massive damage). He can also summon hostile wolves. Defeating him gives the "Ragnarök" Achievement. He will respawn at the next new moon. He drops his fur, claws, and fangs, which can be used to make the Fenrir pendant, wolfbane dagger, Ragnarök cowl, Ragnarök cloak, Ragnarök leggings, and Ragnarök boots. All these items work off a "kill streak", which increases each time you hit a mob or player, but resets each time you miss a hit, block with a shield, or stop hitting for 10 seconds. The higher streak increases the abilities of the items (visually indicated by how much they glow). The dagger does 6 damage, swings rapidly, and does more damage as the steak goes up. The pendant is held in the off-hand and increases regen as the streak goes up. The Ragnarök set absorbs damage based on the streak.