invulnerable?

how can you make units invulnerable in WE, like with out triggers, i know this must be a really noob question but i dont know!!!

go make ur unit u wanna make invulnerable, then go to ablilities>add>invulnerable(neutral)

ya, i feel stupid now, thanks though

woo~invulnerable! like superman? ya

ya but no cytonite or what ever