The End...Again... Advancement

mods/HUD/mcl_achievements/init.lua

@@ -291,6 +291,13 @@ awards.register_achievement("mcl:maxed_beacon", {
 	icon = "beacon_achievement_icon.png",
 })
 
+-- Triggered in mcl_end
+awards.register_achievement("mcl:theEndAgain", {
+	title = S("The End... Again..."),
+	description = S("Respawn the Ender Dragon."),
+	icon = "mcl_end_crystal_item.png",
+})
+
 -- NON-PC ACHIEVEMENTS (XBox, Pocket Edition, etc.)
 
 if non_pc_achievements then

mods/HUD/mcl_achievements/locale/template.txt

@@ -81,3 +81,5 @@ Beaconator=
 Use a fully powered beacon.=
 The Next Generation=
 Hold the Dragon Egg.@nHint: Pick up the egg from the ground and have it in your inventory.=
+The End... Again...=
+Respawn the Ender Dragon.=

mods/ITEMS/mcl_end/end_crystal.lua

@@ -1,5 +1,7 @@
 local S = minetest.get_translator(minetest.get_current_modname())
 
+local peaceful = minetest.settings:get_bool("only_peaceful_mobs", false)
+
 local vector = vector
 
 local explosion_strength = 6
@@ -68,6 +70,11 @@ local function spawn_crystal(pos)
 	for _,o in pairs(minetest.get_objects_inside_radius(pos,64)) do
 		local l = o:get_luaentity()
 		if l and l.name == "mobs_mc:enderdragon" then return end
+		if not peaceful then
+			if o:is_player() then
+				awards.unlock(o:get_player_name(), "mcl:theEndAgain")
+			end
+		end
 	end
 	for _, crystal in pairs(crystals) do
 		crystal_explode(crystal)