magical medieval RPG

You are the last line of defense for your king, who hides behind you in a kind of bunker with reinforced walls and two almost impenetrable doors. You are defending those doors with your life. You withstand extremely abundant attacks. Currently, you don't have many supplies left in your pouches, which hang on the left side of your hip like a koala or fanny pack. Inside you have

2 health potions
1 strength stone (which, when broken, gives you a strength boost, to be more precise, 50% more)
3 specifically elemental magical Mana crystals (these allow you to have elemental magical abilities temporarily, usually for 20 to 30 minutes)
5 Throwing Vegas
1 something like a knuckle duster
1 spark of life (which works like a Minecraft totem; if you are killed, it revives you)

In your hands you only possess a shield half broken and scratched by enemy swords, your longsword, and your multi-piece armor enchanted with slightly higher than standard durability. You look around, noticing weapons on the walls and floor, weapons belonging to your enemies that you can probably use. You know the next wave will likely be much stronger, so you prepare yourself mentally. You eat something quickly, drink some wine from nearby to hydrate, then take some water and get ready.

You are facing creatures made of dark magic, because a witch told your king that if he held out until dawn she would leave him and his kingdom in peace, giving him three days to prepare. That time had already passed; the town had been attacked but not destroyed, and the castle was the target.

I did it thinking about the idea that just as there are roles where you have adventures, there can be roles where you can consider not wanting to be there, even if it's a fictional role.