The curse-reverse remedy is complete, but we still need bait to lure the crows.
Check out the castle if you haven't already - Geron has a useful quote that you can check the signpost to re-read.
The town's banner has been eviscerated, so we need to create a new one.
It'll be a makeshift banner (as per usual), and requires the symbols of the town.
All good guards have insignia on their armor; perhaps the castle guard is still around here somewhere?
He's quite well hidden - talk to the windows above the castle gate to reveal him and the town's insignia.
Looks like it's a green oak tree. Convenient!
We have an oak leaf, and the tarp we cut up earlier will act as a good base.
You'll need to find a needle and thread to begin sewing.
The homes of the other townsfolk are firmly locked, so try checking Geron's house again.
More specifically, check the places where Geron would store his clothes.
Open Geron's clothes chest and take the needle and thread inside - take the green doublet too.
You can then combine the twig with the green cloth.
It's classic arts and crafts! Shame we don't have any proper scissors.
Use your knife on the twig-doublet combination to get a green twig cutout.
Combine the green twig cutout with the white banner.
Looks like the guard's uniforms aren't that patriotic after all - a red crown is needed.
Not very likely - you'll have better luck with the people that are willing to talk to you.
Talk to anyone that represents the kingdom in far lands.
Speak to Knight Wrathling on the outskirts of town and ask for his pennant - you'll get the option to do so after talking about the crows.
You can then combine it with your banner.
Sew the pennant onto the banner, douse it in anti-curse juice, and hoist it up high beside the castle.
Perfect, no more pesky crows - and after a brief audience with the king, we've earned access to the academy.