mods/HUD/mcl_achievements/init.lua

@@ -199,6 +199,13 @@ awards.register_achievement("mcl:enterEndPortal", {
 	icon = "mcl_end_end_stone.png",
 })
 
+-- Triggered in mcl_totems
+awards.register_achievement("mcl:postMortal", {
+        title = S("Postmortal"),
+        description = S("Use a Totem of Undying to cheat death."),
+        icon = "mcl_totems_totem.png",
+})
+
 -- NON-PC ACHIEVEMENTS (XBox, Pocket Edition, etc.)
 
 if non_pc_achievements then

mods/ITEMS/mcl_totems/init.lua

@@ -43,6 +43,7 @@ mcl_damage.register_modifier(function(obj, damage, reason)
 						obj:set_wielded_item(wield)
 					end
 				end
+                awards.unlock(obj:get_player_name(), "mcl:postMortal")
 
 				-- Effects
 				minetest.sound_play({name = "mcl_totems_totem", gain = 1}, {pos=ppos, max_hear_distance = 16}, true)