I like to do these seasonal events so heres now this easter event is. Its a random anomaly you find all over the place. Max destroyer level ships allowed (command dessies can go). I demonstrate the event here:
First room is a bunch of frigs, dessies and the occasional cruiser. Best damage type to deal is EM, best to tank is Thermal - these are not typical guristas rats. They scram, neut but dont do a whole lot of damage. No good loot found so far in this room.
The meaningful room is the second one. You need a gate key to access it. You locate these best by d-scanning celestials (belts, planets etc) where you find an “irregular capsule” - make sure to check this on your overview. Kill the capsule and you get a gate key.
Verdict: took a long time to find a key. Its consumed on activation of the gate so you have to do it all again for the next site. Wish more capsules spawned.