Sneak attack for tactics? Yes, please. This card has some fairly specific requirements, namely a unique Istari and unique Eagle but thankfully not exclusive to heroes. The allied istari are expensive and in 2/3 of the case temporary so you will want to bring their hero version for consistency and timing. The unique Eagles are also somewhat pricey but thankfully due to the new Radagast's Staff that can be made more realistic.
The Eagles Are Coming will also help to get those key Eagle allies into your hand sooner so don't forget three of those.
In the end you will most likely bring this in a deck led by Gandalf or Radagast heroes to bring in more hit and run eagles lol Descedent of Thorondor or Meneldor. But a better one is to bring this card with a Radagast to summon the all powerful core ally Gandalf.
Therr is also more reasons to play Book of Eldacar and Hama hero to get this card back more often. The goal is to try and play it every round which can be done in combination with Wizard Pipe on Radagast.
Great thematic design and really pushes Eagle decks into Outland and Vilya territory. Great stuff.