Basileus Roanas is a Force affinity legendary from the High Elves faction. Basileus is over shadowed by extremely strong legendary and epic champions in the High Elves and will struggle to get into Faction War teams ahead of his fellow faction. He does however bring an AOE stun ability and some strong damage for the Arena and wave control.
You will need to ensure you build enough accuracy to land his stuns to get the most out of his kit.
The best part about Basileus is his A2 and the ability to ignore shields, block damage and 50% of someone’s defence enabling some strong one shot potential in the Arena.