add glow obsidian(s) to group 3

nodes.lua

@@ -403,7 +403,7 @@ minetest.register_node("caverealms:glow_obsidian", {
 	description = "Glowing Obsidian",
 	tiles = {"caverealms_glow_obsidian.png"},
 	is_ground_content = true,
-	groups = {cracky=1},
+	groups = {cracky=1, level = 3},
 	light_source = 7,
 	sounds = default.node_sound_stone_defaults({
 		footstep = {name="default_stone_footstep", gain=0.25},
@@ -415,7 +415,7 @@ minetest.register_node("caverealms:glow_obsidian_2", {
 	description = "Hot Glow Obsidian",
 	tiles = {"caverealms_glow_obsidian2.png"},
 	is_ground_content = true,
-	groups = {cracky=1, hot=1},
+	groups = {cracky=1, hot=1, level = 3}},
 	damage_per_second = 1,
 	light_source = 9,
 	sounds = default.node_sound_stone_defaults({