Legendairy's spelleffects
hmmm in my opinion, they learned a lot alredy, and dont worry they will make some truly legendary looking items.
But putting that aside, i personally would add actual “legendary effects” only. Without items. You could unlock for example A legendari looking mark of blood.
And some skills also had 3-4 normal alternates to. _Like turrets for engineer, or minions for Necro.