You find no explosives. In fact, what’s an explosive? 

Tanrick easily finds the old man, currently sketching a Rhinoceros in the wild.

"Hello, good sir! I am a seeker of knowledge, and it is my belief you might know something special about this place... could you impart that knowledge to me?"

The old man smiles. Good sir? I havent been called that in a long time. Come here, sit down. What would you like to know?

"Why, whatever you can tell me friend!" I say sitting next to him. "what is this place? who are the children that seem to be in charge? why do they have beings from different realms battle in their arena? why are none able to die in the arena, and if they do die, then what sort of magic brings them back completely, and without any strings attached?"

The old man smirks. lets answer those one at a time. You’re lucky those kids aren’t awake right now.

Surely you’ve noticed the snow sculptures, right?  That’s a Simulacrum. It’s a copy. Now, normally they have free will. But, using magic, we put the contestor’s souls inside of their simulacrum. You haven’t noticed since you haven’t died yet, but when the simulacrum dies you float back to your body, which is on a stone pillar 55ft above the ground.

This is... a place. No name, to be honest. The Arena is the Arena of Beasts. Does that answer?

Those Kids are collectors. They enjoy grabbing creatures and helping them live. Then, if they want, they can contest. Currently that goblin in pink is getting cured of his wounds.

And the kids. The Robby’s. How I wish I could tell you everything. Hmm..... ok then.

(full story in a spoiler. I’m stuck in bold)

As he tells you, you experience everything firsthand as he writes it on his sketch pad. Are we done now?

"hmm. yes I belive so. you've been most informative. one last thing.... do the Robbie's still wish to see their family? is there a way I could assist with that?"

Well, of course. They’ve been here for 76 years though. Unable to age unless put back together. I should know. Been here the entire time. Only way to do it is if you could reverse time, pal, and that ain’t happening. Don’t tell him I told you, he won’t like it.

(OOC: ok, so not gonna do this, but my curiosity is getting the better of me irl. so when I made the wall with faces from the other peoples pasts, you ruled that I didnt need to know there past in order for it to work, because the images of the people would be pulled from their minds. so if I say hypothetically used  minor illusion to project a family, and I did this in front of one of the kids, what would happen?)

(You’d scare the crap out of them. They are well aware their family is dead after 76 years of never dying, so creating a fake family would likely end up with a shishkabob Tanrick)

Tanrick thanks the old man and retires to his room to rest.

The next day passes. The sun rises, spreading its harshly bright light. As you all in the Bar witness the kids battle again. Anger, with a Kobold! Ultra, with a Wolf! Smart, with some Crawling Claws! And Tech, with (this time) a swarm of bats! Everyone watches as the bats fly away and wait out the match until the Crawling Claws ‘win’, and the bats tear them down. Get ready..... your next 2 arena’s will be different.

Tanrick will spend the day in the bar, trying to earn some extra coin by doing magic tricks, mostly using minor illusion.

Next level 3 match has been posted! https://www.dndbeyond.com/forums/d-d-beyond-general/play-by-post/32763-robbys-beast-fighting-fun-times?page=29

That would be Atom, Jathon, Tanrick, Damian, and Lanour. I will only wait 24 hours.

A gaunt figure with white hair and light blue skin speckled with midnight blue, walks up to the bar and orders a drink and a small meal.

The one eyed dwarf that owns the bar hands you some chicken tenders and chocolate milk, which is surprisingly alchoholic.

Devouring the food infront of him and thanks the cyclo-dwarf.”delicious never before has such cuisine graced my palette!!! Do you require payment fine sir? I am a but a lost traveler and do not know if my currency is any good here.”

A giant metal man walks in, with a shield strapped to his arm. He holds a hammer inside of one hand, and takes a look at his opponents in the Arena. Interesting. One uses smoke to block the objective, while the other attempts to capture it but to no avail. Interesting. He looks at the so called ‘Lost Traveler’. Why, you’re here for the Arena, no? It’s why I’m here after such a long lifespan. Love the simulacrum’s. Nice way to keep contestants alive.

Peeking his head up to the sound of the metal man walking in to the bar. “Arena?!?!?! Yes of course, interesting enough I’d say. Friend I’ve never seen the likes of you before. What are you?”

The metal man smiles. I am a consciousness built for war when there isn’t any, fueled by an Elemental. Or, a warforged. Where do you come from, strange man? I’d like to know more.