This Epic Event is extremely powerful and versatile. The amount of value possible for this Epic Event that costs 0, makes it one of the strongest in the game.
As said previously, movement and support of offensives is key for Skyspear Avians and this card provides that, allowing you to reposition and bring reinforcements without spending movement.
In addition to that in the same turn, it can allow for even more repositioning, protecting both Ava, and the repositioning units.
An important note is that the ceiling of power for this event is very, very high and yet you shouldn’t be greedy. Sometimes just repositioning in one of the phases is enough value to still use this. Don’t clog your hand waiting for that perfect turn, just find a spot with enough value to play this, which is not going to be hard given the power and versatility of this event.