What is precisely considered a "start of battle"? Geralt can drink potions at the very start , which means before resolving the monster's "before rolling" effects and, of course, actually rolling the dice. But if the player faces a face down monster, does he have to drink the potions before flipping the encounter face up? In the opinion of me and some other players Geralt might be a bit overpowered if he drinks immediately...what should be done in that case?
Additionally, how do I play the Maribor Forest potion? Do I drink it and then decide if I'll produce a Sword a Shield or a Ritual or I get to actually choose between the three after rolling? I'm guessing the former (though we didn't play it like that).