. I read you're post wrong, thought you said Link was bad, I apologize.
Well Link has the golden gauntlets, which makes him able to lift something the size of a small building and toss it over 10 meters up in the air, and about 10 meters away from him, and he does it pretty fast. He has an enormous amount of more strenght than Arthas. And his sword is the evils bane, and the strongest sword ever built in Hyrule. (I can give you a link to that source and some more info later, gotta go out now...) so it will likley, combined with Link's strenght, cut through Arthas pretty badly...
A giant Link would most likley kick him miles away. And he is not as slow as an AT-AT in Star Wars, he is like a big human. He would move around much, much quicker than Arthas could keep up with his legs. Besides, standing under Link's legs would not be a pleasent sight 🙄
Where does it say it's indestructible? Then Link's shield is also indestructible....
And although I do not belive Link have hearths (which makes no sense at all), one of the Great Fairys gave him silver hearths, at least if we are going by logic, made him more resistant to damage, mabey made his skin hard as silver, who knows....
And I still don't think Arthas can see him when he is invisible....
I agree, it's to hard to judge the immortal part, (although I haven't really seen it included in facts about the Lich King), so it's hard to judge...