Alright:
- Not in green.
- Creature based.
- Would like it to be in blue.
- I don't like commanders that are ridiculously easy to build (Atraxa, Praetors' Voice; Yarok, the Desecrated; Korvold, Fae-Cursed King; etc.)
- I like commanders with enough support to make a strong deck, though. (Not too hot, not too cold)
- I like commanders that are integral parts of their decks (yet again, Atraxa, Praetor's Voice isn't necessarily required to build a good counters deck)
- Because I like commanders that are integral parts of their decks, I don't want a commander that costs 6+ mana because after just a couple casts, they'll never be cast again for the remainder of the game.
Ok, I've got some ideas.
The Scarab GodNot in green - check
Creature based - check (in EDH at least)
Would like it to be in blue - check
Not too easy to build - check. Many variations for Scarab God. Zombie tribal is easiest, but certainly not the only option. Doing something much closer to his standard deck from back in the day is also a strong option. Dimir Control and ETB abuse with the reanimation effect. Milling opponents to steal their stuff is another option.
Enough support to make a strong deck - check. Zombies, strong ETBs and Mill are all plentiful in Dimir.
Integral part of the deck - check
Doesn't cost 6+ - check, plus you save on commander tax because of his last ability.
Marchesa, the Black RoseNot in Green - check
In blue - check
Creature based - check
Not too easy to build - check. Again, loads of potential options. +1/+1 counters. Suicide. Steal and sac.
Enough support to be strong - check. Not top tier, but certainly formidable when done right
Integral part of the deck - check
Doesn't cost 6+ mana - check
The last one is a perhaps a little off on some of the points, but still potentially a good option.
Talrand, Sky SummonerNot in Green - check
In Blue - check
Creature based - check, if you want it to be
Not too easy to build - kind of depends. A lot of people play control and use the drakes to kill after slamming down a
coat of arms. That's how I built it back in the day. If you build it this way, it's kind of easy to build, but kind of challenging to pilot, which is fun in it's own way.
Enough support to be strong - check
Integral part of the deck - check if you're going the drake route, not so much if you're just combo-ing into lab man
Doesn't cost 6+ mana - check