|Two Worlds Creature|
Sand Dragons are by far the easiest of the dragons. They do not require much to kill, even if you are only level 20. A few small healing potions suffice for this large creature. Also, as a bonus, for two of the locations in which the sand dragons are, there are Maliel Shrines right next to them. Simply stand there, and cast away with spells or arrows, making it stop. Keep doing this, and it will die quickly.
Melee is also a good way of killing a Sand Dragon using a combination of slashing and bludgeoning weapons is often a good tactic.