@FanOfMostEverything  
Yeah, I know. It also means you can’t put in things with hybrid/guild mana costs even if you could pay for them completely with the colors in the deck. I’ve been very into commander stuff lately, building/built myself a Markov deck. Got about 70% of it. Current build isn’t amazing yet, virtual testing of it shows me I need more creatures, or at least more card draw, which isn’t that easy to come by in Mardu colors.

@Wesley Foxx  
Yup. Even for nonlegendaries, both sides of a DFC count for its color identity. For example, if your commander isn’t black, you can’t put Westvale Abbey in your deck. Civilized Scholar is blue-red, Loyal Cathar is white-black, and so forth.

@Wesley Foxx  
Yes, a DFC with more than one colour over both sides is considered both colours for the purpose of being a commander. It’s the same kind of thing as Archangel Avacyn. Also of note is that you couldn’t have this card in a mono white deck, even though Stygian himself is mono white.

… Huh. Not sure how double faced legendaries work with regards to EDH commander slots. Would he be an Orzhov commander because his flip-side uses black in the ability cost? That ability doesn’t actually exist on the Stygian, Pillar’s Base card that would have to be what your commander officially is. The only two existing cards I can find with a quick “Text: Transform” “Type:Legendary” search that are creatures on both faces are Avacyn and Ulrich, and only Avacyn’s border/symbol color indicates in any way it might be a different color when flipped. Google says Avacyn is Boros, so I guess he would be Orzhov then?

This would be oodles of fun in EDH. Not to mention Leyline of Singularity.

@Background Pony #5928  
That takes all the fun out of life gain. No, I want a Serra Avatar with a Celestial Mantle while I control True Conviction. That game I ended with 5,143,027 life.

@Phil Srobeighn  
If you’d really wanted to be nasty, you’d have combined it with Test of Endurance, or even worse, Felidar Sovereign.

@Phil Srobeighn  
That’s disgusting.
 
I like it

@Phil Srobeighn  

@The Hittite  
Sure thing, boss. Have I ever told you about the time I gave Brigid, Hero of Kinsbale a Basilisk Collar?

Yeesh, talk about a removal magnet.

Decent card. I’d use it.

@Dreadmaster231  
Maybe if you infinite mana combo. Which is possible in BW, but not something that can’t be dealt with. Plus you can spam block it with enough tokens to kill it if they can’t pay for the ability, unlike things like Teysa or Progenitus

That… that could become really overpowered afterwhile.
 
’Specially if token monster decks are in play.

Solid card.

I make no promises.