First two questions are related to the Berserker subclass of the Barbarian class. I am trying to make sense of it.
1. Frenzy description says "your Rage turns into a frenzy as you release your unquenchable fury and bloodlust". What is Rage exactly? Looks like I can cast the ability at any point in combat so I think Rage might be irrelevant but I wanted to make sure anyway.
2. I would like to throw stuff as Berserker for damage but I am not sure what are some good things to chuck that I can pick up. Any suggestions for this? So far I have only thrown a mind flayer corpse but the range on that was not good.
The third question is about long rests.
3. Is there any downside to long rests? I was thinking we will turn into mind flayers if we take too long but I am not sure if that is the case.
Rage gives you damage resistance and advantage on strength saving throws. It's what makes barbarians tanky. Berserkers rage turns into frenzy which allows them to use frenzied attacks and frenzied throws as bonus actions.
Weapons! Any weapon with the thrown tag (daggers, spears, javelins, handaxes) will deal their damage when thrown, plus any bonuses you have to throw attacks. For example, you really want the tavern brawler feat if you like throwing stuff because it gives you a bunch of extra damage. There are also items like rings and gloves that give you extra throwing damage. If you're interested in multi-classing, the eldritch knight subclass has a feature called bound weapon that makes your main hand weapon return to you after being thrown.
No, the only downside is the cost of supplies. Rest all you want and let the continued storyline explain the tadpole and transformation.
Thanks. Coincidentally before I read your reply I picked up a bunch of javelins and have been throwing them to great effect. I'll pick up swords, daggers, etc. too. I haven't been able to make use of rage/frenzy too well so far but practice will fix it.