Spookay Lucky Block

Breaking a lucky block rolls a random result. Some results spawn mobs such as the Boomer Creeper and Witch, others place block structures, hordes or mini bosses, including Super Witch, Mother Spider and Boomer. Rewards range from epic items to sudden floods of dangerous mobs, and the author warns that a single block can destroy a whole area.

The mod also sorts in armor pieces that grant abilities borrowed from mobs. Creepefied Enderman Armor lets the wearer teleport like an enderman, Iron Golem Armor matches the golem's attack power, Spider Armor allows jumping and climbing walls, and Cave Spider Armor adds poisoning on top of that. Wither Armor is listed as having little effect so far. Placing a pumpkin around a dropper or crafting table can also trigger a result.

Spookay Lucky Block requires the lucky block mod to be installed separately, placed in the mods folder as a standalone mod. The mod is client and server, so the server and every player need it. Its files target 1.12.2 only, and it is released under All rights reserved, so it is not open source. The author suggests backing up the world before use and placing the block at least 1000 blocks away from a base.