BOSSES

nether drillman - hp - 250 damage - 7 armor - 19, ummune to fire, arrows, fall, cactus and explode attacks: drill hand (damage - 15), drills in random places, dash and meteor spawn place: nether wastes

nether admillar - hp - 250 damage - 16 armor - 18, ummune to fire, fall, wither spawn place nether wastes, attacks: five small fireballs, dash, two large fireballs and wither skull (50 hp only)

BIG DIAMOND:  - hp - 560 damage - 26 armor - 25 ummune to fire, arrows, fall, cactus and trident, no spawn place, attacks: smash and arms, bite, shooting, crystals waves jump and jump + shoot

drops

big diamond sword - nothing new, just a big damage, damage - 14 type - sword dropping from big diamond

glow crystal (idea by medovibee) right clicking to summon crystals wave, to save you he giving you regeneration when this happening

fortress admirall's spear - damge - 12 type - special (spear)

ultra drill - when you hurt living entitys with this tool it giving entity drilling effect

achievement

egorsans's bosses mod - giving when you will join your mod with this mod

drills is so boring - giving you when you will defeat nether drillman

general of wither skeletons - giving you when you will defeat fortress admirall

so many diamonds - giving you when you will defeat big diamond

so! i must tell you that this achievements with bosses defeating is not working yet, i will fix it in next update