minetest.register_abm({ label = "Oxidatize Nodes", nodenames = { "group:oxidizable" }, interval = 500, chance = 3, action = function(pos, node) local def = minetest.registered_nodes[node.name] if def and def._mcl_oxidized_variant then minetest.set_node(pos, { name = def._mcl_oxidized_variant, param2 = node.param2 }) end end, })