Skuttle is a crawling bomb designed for one purpose – to go kamikaze on enemy units and structures. It deals damage in a large radius when it explodes and even way more damage (2,5x) when you self-destruct it in time.
If used in a pack remember to spread them to avoid chaining.
Thanks to their amphibious attribute they prove very helpful in attacking and regaining sea territory.
The Skuttle can also cloak. Use that ability to sneak in unharmed and destroy big blobs of enemy units at once.