Parasitic Bees

Bees are hostile now and their nests spread. Ignore them and you get more nests and more swarms. Cure nests with containment potions or deal with the swarms.

Each dimension has its own type of Parasitic Bee — void bees in the End teleport and use dragon breath type of sting, nether bees are fire-proof and lava-proof and can wither you. You can infect nests yourself for resources (and more spread) or use a potion to sneak past. Config controls how fast it spreads and how hard it is.