Allow portals to break only in creative and to be pointed.

mods/ITEMS/mcl_portals/portal_nether.lua

@@ -138,8 +138,6 @@ minetest.register_node("mcl_portals:portal", {
 	sunlight_propagates = true,
 	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "blend" or true,
 	walkable = false,
-	diggable = false,
-	pointable = false,
 	buildable_to = false,
 	is_ground_content = false,
 	drop = "",
@@ -152,7 +150,7 @@ minetest.register_node("mcl_portals:portal", {
 			{-0.5, -0.5, -0.1,  0.5, 0.5, 0.1},
 		},
 	},
-	groups = {portal=1, not_in_creative_inventory = 1},
+	groups = { creative_breakable = 1, portal = 1, not_in_creative_inventory = 1 },
 	on_destruct = destroy_nether_portal,
 
 	_mcl_hardness = -1,
@@ -863,4 +861,3 @@ minetest.override_item("mcl_core:obsidian", {
 		end
 	end,
 })
-