There are no significant similarities in the two titles, except for the word scrolls. I thought Bethesda had more class than this to have legal issues over such trivial things. Bullying on a smaller company because you feel threatened because of their overwhelming success is embarrassing if you ask me. Mojang wouldn't sue Bethesda on the rights to axes, zombies, skeletons, or any other similarity in their games, so why be a bully and possibly lose hundreds of thousand of potential buyers to a silly lawsuit?
You could learn a thing or two from community oriented gaming companies.