Morophon, the Boundless
Morophon, the Boundless
Changeling (This card is every creature type.)
As Morophon, the Boundless enters the battlefield, choose a creature type.
Spells of the chosen type you cast cost
less to cast. This effect only reduces the amount of colored mana you pay.Other creatures you control of the chosen type get +1/+1.
illus. Victor Adame Minguez # 1/254

Oracle Text
Changeling (This card is every creature type.)
As Morophon, the Boundless enters the battlefield, choose a creature type.
Spells of the chosen type you cast cost
less to cast. This effect only reduces the amount of colored mana you pay.Other creatures you control of the chosen type get +1/+1.
Or BR Mercenaries for Mana Echoes and I guess there's a handful of actual red mercenaries. Soldier of Fortune, a few others that honestly suck.
I bet there's a lazier Mana Echoes combo out there but its just exactly what Rebels and Mercenaries need to go officially nuts.
confirmed - Jodah, Archmage Eternal also works
More importantly, if you're willing to accept that you aren't having a commander who will effect the board state significantly when cast, you may as well just use a commander with an effect from the command zone and admit you won't ever cast it.
With Morophon, I can run an angel deck that splashes a bunch of multicolor angels but has only plains as lands. I could splash non-black zombies into my zombie deck and maintain a mono-black mana base. The list goes on.
While Ramos and the line can certainly let you fit in any weird combination of colors for a creature type that lacks a commander, only Morophon let’s you splash in off-color tribal pieces without disturbing your mana base. That’s a sort of significant thing.
If you wanted to do white/red goblin commander and notice there wasn't a legendary goblin in those colors then sure, use this guy. You might cast him at some point, and the +1/+1 should help the pile of tokens one assumes you're making. But at the same time, you could just as fairly make your commander The Ur-Dragon and throw in some changeling spells like Crib Swap or Taurean Mauler (which are both mighty fine goblin spells) and I think that's a better way to play WR goblin commander than this guy.
You can probably casually add him to any tribal decks you already have on the "meh why not" principle but he's not earth-shaking.
CMC<=3
Cleric
Human
Merfolk
Shaman
Soldier
Warrior
Wizard
Zombie
CMC>=4
Angel
Beast
Cleric
Dragon
Human
Shaman
Soldier
Warrior
Wizard
Zombie
Further I think this will ultimately feel underwhelming for decks that try to jam tribal in the hopes of getting Jodah/FoS for free creatures all the time, there are so many ways to produce all of the generic you could possibly need. I think Morophon makes more sense to play in the 99 of another tribal general or to leverage the multicolor list above so that each time you cast him you can get a few multicolor creatures cheated in and capitalize on tribe synergies. Honestly I think this would make an awesome alternative to Varina for Zombie tribal, but I think it will most likely land in the 99 as an alternate for Ramos for me. Ramos into Morophon into 3 multicolor creatures then you have Ramos primed to pay for any kind rebuttal you may need to make.
If you are using Gemhide Sliver does the 10 mana invested into the 2 card combo to reduce the costs of slivers even matter? What else are you planning on doing with your mana at that absurd point in the game anyway?
Also lets say you think Morphon is worth using. Why bother with Fist of Suns? Why not pay 2 or 3 for your average sliver and still 0 for the 5 color legends? The only sliver that the amount of mana to cast him would be significantly reduced by adding fist of sons to this combo is the Morphon that's already on the battlefield for that combo to work.