League of legends: Tryndamere

Interesting, I think I'd make him white/red Legendary Human Warrior(not knight he is a barbarian after all).  Abilities would be similar, but the permanent counters should be rage counters and he has to remove his rage counters to gain indestructible and double strike till end of turn.  Destroying artifacts or creatures probably doesn't fit his profile, but maybe when attacking he does 2 damage to all of the opponents creatures.