I'd been meaning to make something with Rograkh, Son of Rohgahh since his release, initially thinking about a Pokemon-esque 'gotta catch them all' with all the familiars as his partners. However, rules-wise that's obviously impossible, and hard to rule zero for (my playgroups don't really do this) so I'd abandoned the idea. With the release of Yoshimaru, the extremely cute shiba, the idea came back with a twist: what if there was just one companion, with the deck focusing on their growth and adventures together? (note that I'm not that familiar with Adventure Times, but I can see people making the analogy in a heartbeat)
Note: this is a theme/ludonarrative-focused deck. To some it might give insane snowflake/cringe-vibes, as it deviates from a lot of what commander has become over the last decade (card-choice is based on completely different axes). I hope you can step past that and see the design intent behind the deck.
Working out themes, there's a lot to draw from: the classic friendship-focused manga/anime like pokemon, JRPGs, the hero's journey, good boy/dog-and-child tropes. With all that buzzing in my head as a moodboard I went through my collection and the following themes emerged:

Companions

Bond between the two

Getting stronger/mentoring

Going on adventures!

Benevolent entities

Heroism

Writing down all my thoughts, my mind went beyond the cards I own and some potential fun additions could be:

I don't know if they are on theme but have you looked at the Backgrounds from the recent D&D set for the 98? They are legendary (for the dog) and playing with twice the commanders gives you twice the triggers.

Vertierer wrote: ↑

1 year ago

I don't know if they are on theme but have you looked at the Backgrounds from the recent D&D set for the 98? They are legendary (for the dog) and playing with twice the commanders gives you twice the triggers.

Indeed, I would recommend Tavern Brawler. While the flavor is suspect - a child and his pet getting drunk and starting punch-ups? - it would be one of the most effective things with two cheap commanders and particularly with Rograkh.

void_nothing wrote: ↑

1 year ago

Vertierer wrote: ↑

1 year ago

I don't know if they are on theme but have you looked at the Backgrounds from the recent D&D set for the 98? They are legendary (for the dog) and playing with twice the commanders gives you twice the triggers.

Indeed, I would recommend Tavern Brawler. While the flavor is suspect - a child and his pet getting drunk and starting punch-ups? - it would be one of the most effective things with two cheap commanders and particularly with Rograkh.

Not to beat a dead horse with my obsession for this card, but I really like Noble Heritage here.

a) They're both literal royalty, so it fits flavor-wise.
b) The deck already has a major +1/+1 counter mechanical theme between Yoshimaru, Ever Faithful himself and the Mentor cards.
c) Rograkh, Son of Rohgahh wants them counters to lay down the beats.
d) Who in their right mind wants to attack a boy and his dog?

Yeah, I'd been eyeballing those as well. Agreed with TheGildedGoose, Noble Heritage is a slam dunk for a lot of the themes here! (And somewhat hilarious as especially Rograkh doesn't really feel all that royal).
Folk Hero also sounds fun, purely as having that background flavour/story-wise. EDIT: although gameplay-wise it's a very poor fit, with the lack of cobolds in the deck

I don't have any suggestions or anything. I just wanted to say that this deck looks really cool.

Noticed I was missing a card (count came at 99), I'd missed Forgotten Cave.

Also thought of sagas as another nice representation of story (adventure cards might also work?). Haven't gone through all of them, but here's one change:
Angelfire Ignition → Befriending the Moths // Imperial Moth

Befriending the moths is a perfect 'companion'- and 'going on an adventure'-card at the same time, and mechanically helps our heroes get through. Angelfire Ignition is a bit too 'holy' for the theme.