Because you’re super lucky, you notice a loose brick in one of the passageway walls.

With nimble fingers or beak, depending on who you’re playing as, you work the stone free. There’s something hidden behind it!

It’s piece of old parchment, with a crudely drawn picture of some kind of monster. You flip it over, to reveal a cryptic message written on the other side of the parchment.

In Hollow’s heart where dangers lurk,
The goose hydra waits, and it’s berserk.
Four geese heads with eyes ablaze,
Beware its wrath, in perilous maze.
If you plan to journey to its abode
Remember to learn this magic code
‘2241’ will release the gem
To strike down this evil lord, ahem

Wow. That seems important. You pocket the piece of parchment and continue on down the tunnel.