diff --git a/sand_monster.lua b/sand_monster.lua
index 5194c17..e3ae0f2 100644
--- a/sand_monster.lua
+++ b/sand_monster.lua
@@ -78,6 +78,14 @@ mobs:register_mob("mobs_monster:sand_monster", {
 		punch_start = 74,
 		punch_end = 105,
 	},
+	immune_to = {
+		{"default:shovel_wood", 3}, -- shovels deal more damage to sand monster
+		{"default:shovel_stone", 3},
+		{"default:shovel_bronze", 4},
+		{"default:shovel_steel", 4},
+		{"default:shovel_mese", 5},
+		{"default:shovel_diamond", 7},
+	},
 --[[
 	custom_attack = function(self, p)
 		local pos = self.object:get_pos()
diff --git a/stone_monster.lua b/stone_monster.lua
index 43fb97f..876b6f7 100644
--- a/stone_monster.lua
+++ b/stone_monster.lua
@@ -51,6 +51,14 @@ mobs:register_mob("mobs_monster:stone_monster", {
 		punch_start = 40,
 		punch_end = 63,
 	},
+	immune_to = {
+		{"default:pick_wood", 0}, -- wooden pick doesnt hurt stone monster
+		{"default:pick_stone", 4}, -- picks deal more damage to stone monster
+		{"default:pick_bronze", 5},
+		{"default:pick_steel", 5},
+		{"default:pick_mese", 6},
+		{"default:pick_diamond", 7},
+	},
 })
 
 
diff --git a/tree_monster.lua b/tree_monster.lua
index 92690f6..039bb72 100644
--- a/tree_monster.lua
+++ b/tree_monster.lua
@@ -41,11 +41,17 @@ mobs:register_mob("mobs_monster:tree_monster", {
 	lava_damage = 0,
 	light_damage = 2,
 	fall_damage = 0,
---	immune_to = {
---		{"default:axe_diamond", 5},
---		{"default:sapling", -5}, -- saplings heal
---		{"all", 0},
---	},
+	immune_to = {
+		{"default:axe_wood", 0}, -- wooden axe doesnt hurt wooden monster
+		{"default:axe_stone", 4}, -- axes deal more damage to tree monster
+		{"default:axe_bronze", 5},
+		{"default:axe_steel", 5},
+		{"default:axe_mese", 7},
+		{"default:axe_diamond", 9},
+		{"default:sapling", -5}, -- default and jungle saplings heal
+		{"default:junglesapling", -5},
+--		{"all", 0}, -- only weapons on list deal damage
+	},
 	animation = {
 		speed_normal = 15,
 		speed_run = 15,