Plaguebringer Tillinghast at New Agamand wants you to use Tillinghast's Plagued Meat to attract down a Proto-Drake and observe its reaction to eating the stuff.
1x Proto-Drake Plague Results Observed
Wait, that gives me an idea! What if it didn't kill the whelps because it was sprayed on the outside of their eggs?
[player], we have to get the plague inside of them!
I know! I've got some plagued meat here. Take it to the Ember Clutch and get them to eat it!
But no, we're thinking too small. Let's get one of the proto-drakes flying overhead to come down and eat it.
Stay close to the meat and observe what happens. Yes, it might attack you, but such is the price of progress.