Archon (XCOM2)

The Archon appears to be an evolution of the Floater, but instead of a dedicated ranged weapon, Archons are armed with a powerful melee-ranged hybrid weapon instead. They can fly and have good health and dodge, making them tough to take down. In addition, if they take damage they will Enrage, giving them an extra action that will almost certainly allow them to close with you next round.