Rastakhan's Rumble Guide
Battlecry: Discover a Treasure.
Here's the results I've had so far:
Hope this helps.
Now it gave my 3choices: you can discover a random treasure
and another cartographer
After seeing the post from Hikas_, I have updated this list below. It looks like this card can discover any of the treasures from Monster Hunt. At the least, these are the possibilities:
BandageBestiaryBrass LanternCartographerCoin PouchGattling GunnerGentleman's Top HatGilnean TrackerGilnean VigilanteHallowed WaterOld Militia HornPristine CompassRicochet ShotRoyal GiftSneak AttackSpyglass