Wow, I've never even heard of Ebonarm...the wiki mentions him in relation to Daggerfall, but where is he in Oblivion?
For locky's riddle, it's obviously an alchemy ingredient that has Restore Fatigue, Night-eye and Burden. Fourth is probably Restore Health. So going to the
ingredients list...ok, must be off on something. The weighing down must be Burden, though, so let's just check the Burden ingredients...
Yeah, Orange looks like a potential. Restore Fatigue,
Detect Life, Burden, and Shield. And tomatoes have the exact same assortment. I'd say that's got to be it.
Other thoughts:
A Radish has Restore Fatigue, Chameleon and Burden. The chameleon could meet both lines 2 and 4.
Viper's Bugloss Leaves have Cure Paralysis, Night-Eye, Burden, and Resist Paralysis, which fits.
Watermelon is Restore Fatigue, Light, Burden, and Damage Health (which used as a poison could save you in combat.)
But since we need something that is two possibilities, I agree with squirtle.