Times Silent Keeper
Gold 0COMBAT DEFENCE
LUK 2000ELEMENT MODIFIER
You get 3 choices:
Be Friends!: You'll find a Behemoth inside. If you're a Guardian, it'll be "drawn to the natural charisma of Guardians" and you can decide to be its friend (i.e. get it as a guest) or attack him anyway.
Attack it!: Battle a Behemoth. If you aren't a Guardian, and you try and befriend it, it'll attack you.
Run: Battle ends immediately, and you just get the XP.
You come upon a dark cave, and something big is moving inside...
Info from Yoshi348. Image from Stephen Nix.