In the hero selection screen, make irrelevant aura icons on heroes disappear!

Examples

If I'm in arena, and I see Grand Oak Padraig (25% speed in Dungeons) then he should have no visible aura icon on the upper right of his hero portrait.

If I'm in Grim Forest, and I see Marius (35% defense in all battles) his aura icon on the upper right of his portrait should be visible.

Easy wins!