Probably the weakest event of the deck, it is for the most part just an extra gate.  Is it worth losing 2 life on a gate for the force one space effect?  Very marginally so … and it depends.
Ava does really need gates to mount an offensive, and the benefits of this Avian Gate are marginal though multiple. It can save you valuable movement, it can make Aerie Divers easier to use, and it can be used to move units inside Ava's range to gain Flight from her Take to the Skies ability. 
Some general advice is this is a "UOD card" (use or discard), that is to say there are times where it will be exactly what you need, and go ahead and place it next to Ava or even defensively if you really need a gate, but if you don’t need it this turn, just discard it for magic. It is not worth clogging your hand saving this and most of the time a regular gate will do just as well or better.