Snake would be a less offending (to FG Scorpio) name and more fitting in theme.Scorpion is more like a desert creature.I probably would make it a time creature, with sting as an ability to poison other critters (for death quantum).
There are now three scorpions. Dune Scorpion is time, Deathstalker is death, Forest Scorpion is life.
Death scorpion sounds like something Scorpio might use, but it would need Eclips/nightfall or some other buff first. Does Dune discard from your opponent or you?