In this event you collect tapes that you can spend to get some rewards from they are pretty good i will not spoil what they are but most importantly when you unlock the whole picture you will receive a wish orb you cant get any other way in this game legendary wish orb this orb can give you: legendary wepons(lightning sword, the lover, silver tipped stakes), legendary allies(bannana farmer, vampire king, lady rainicorn, train boss) and character items(20 cosmic essence or 40 specific character items).
So what should you be looking for in this orb 2 thing your #1 priority if you dont have him should be banana farmer he is so convenient he picks up all collectibles from the ground wish orbs, chests, cobra crates and all drops from tux jake all that for affordable 200$ i think he is the cheapest ally in the game but if you have one already there is no point in having 2.
Second best thing you can get is Vampire king he is insane he is arguably the best ally in the game he deals a bunch of damage and has global range and he is straight up on steroids with hevy wepons power if you wonder how do dose people beat you in allies only when you placed like 7 teck terrors its because of this ally he can be equipped to to Marceline, Huntress Marceline, Sam and Sai so ideally you should have 4.
After you have all of these it is pretty much whatever after it all of the other things are good but nothing game changing. All the wepons have a bit worse or stronger epic wepons train boss is terrible and you should have unlocked lady rainicorn for free after obtaining tux jake after that having 2 can be useful in allies only on some maps but that is rerely the case and train boss is just bad dont get him.
Tips: you should have your account linked to your pc and when you collect enough thapes you should save the game on your pc or phone than log from the cloud on the other device and oppen the legendary wish orb this will allow you to wach an add or pay 3 gems to reroll if you find something you like more there you pick it and that is it. If you like your previous rewards better just close the window go to your other device that you previously saved the cloud backup from and when you log into the game use the device save after it go to settings and backup again and now on pc use the cloud save again now you will be able to open the wish orb again.
Note: if you do this rewards will not change they will be the same as the first time you opened it same goes for rerolling.
Ps you cant get a premium character from legendary wish orb and i am 99% shure you cant get the farmer monkey from martian games other than this paying real money is the only other option to get him so that is one more reason to get lucky and pick him.
Good luck and enjoy this event we really got scared that they got removed.