In a large ice castle in a snow biome somewhere, you might find: The Catalyst! It would reign over the strays (ice variant of the skeleton), and be larger as well. Standing three blocks tall and wearing a unique crown atop its head, this special version of the Stray would be a new boss that can be found in ice/snow biomes. It would switch between its multi-shot crossbow and its diamond sword to fight the player, giving the slowness effect if they are hit with either. This boss would also summon a small group of low-health strays holding stone swords every minute to help it in battle. The Catalyst would also have 100 health points. But after you defeat it is where the fun begins: the Catalyst drops “The Crowned Skull” which is the catalyst’s head (crown attached). When this is worn and the player is attacked, a Friendly Stray wielding a stone sword will spawn and help them in combat (for the price of it providing only 1 armor point). The Catalyst would also drop blue ice, diamonds, and a heap of XP. This isn’t just it though, defeating the Catalyst will give the player the, “Harsh Winter” effect. In which the entire world, no matter the biome, will have a dark and thunderous storm for 3 days, in which mob spawning is increased. The player would not be able to sleep through this.