Whilst not benefitting from attack speed and only being a single target dps Vierna can be underwhelming at first glance, but her basic attacks apply good damage over time and as she warms up she will attack two units instead. Her ultimate is also a high damage AoE with the extremely powerful ability to execute many low health targets at once. Although her bond skill is minor at best Vierna can be amazing at all stages of the game and being able to kill units in one hit is situationally insane.