Is spoiler season complete? Not sure if we're done with the commander stuff. Anyway, here's my rundown:
Spara's Headquarters
Fetchable triland that gives us a little (albeit very expensive) cycling value off loam. Solid.
Endless Detour
Most flexible answer to date, at a reasonable cost. Biggest downside is that it's not a permanent solution, but that can have political upsides too so it's not all bad. I'm not sure if I necessarily prefer it to
Commit // Memory though. Ofc they're really similar, but putting the card an extra spot down can be a significant upside, and while the aftermath doesn't come up often, it's definitely not nothing. If you get low on cards, if someone has a 20-card hand, if you're running out of cards in deck (if you aren't running
Nexus of Fate or it got exiled somehow), or if you're in an archenemy situation where you want to refill your allies' hands efficiently without bouncing Phelddagrif. Plus the cost is more flexible. On the other hand, detour costs 1 less and can hit a graveyard card, although that's a very weak mode imo. I dunno. I plan to run both, they're both good.
Brokers Charm
Technically playable for someone building this from scratch but there are definitely better options.
Brokers Hideout
It's a fetchland on a budget with some small upsides. It's ok.
Even the Score
It's fine.
Depopulate
It's fairly cheap and you can suicide Phelddagrif for a card. Better options exist but it's ok.
Out of the Way
Personally I'm not into it. The good thing about
Into the Roil is that it costs 2 reliably when it NEEDS to cost 2. This costs 2 randomly, when you often won't care about it. Reliably costing less when you need it to >>> reliably drawing you a card. I never consider 4mv cantripping bounce spells because they need the flexibility imo, and this will be that too frequently for my liking. Can't target your own permanents either, so no saving your telepathy before a wipe lol.
Mysterious Limousine
This is similar to
Tawnos's Coffin as a way to either eat someone's commander permanently (until they remove the limo or you decide they're a lesser threat) or repeatedly eat their commander. As a means of suppression it's interesting, ofc you need to be able to attack safely but since it's not restricted in who it can attack, someone's probably motivated to let you through, or at least bonk into a hippo you provided them. Mostly worse than rod but another interesting option.
An Offer You Can't Refuse
For decks wanting to keep up with cEDH nonsense, this is really strong. Unnecessary for casual groups, but you might be able to use the treasures to smooth things over in casual settings, who knows.
Run Out of Town
Another one where there are many better options, but the flexibility is significant and it's easy to acquire.
Witness Protection
The cost is amazing, but usually that's a lesser concern for this type of effect. If you need a commander dead on turn 1, just use regular removal.
Tenuous Truce
Adorable. I'm not big on such concrete forms of cooperation, though. You want people to be wanting to be on your good side - this card says "THIS guy is on my good side, and the rest of you aren't". I guess you can undo it by attacking but that's clunky. And I don't love forced draw since it can overflow us. All that said, when you're in a situation that dictates a clear ally, this is damn efficient at what it does.
smuggler's share
I don't think catchup value necessarily suits this deck. It's nice insofar as it's usually nonthreatening, but usually I'd rather have more direct control over my resources.
Brokers Confluence
Dammit.
in too deep
If it had flash it'd be a fine creature removal. As-is, it's a good card but it just doesn't really fit into the slots we care about since it's not an instant and it doesn't deal with anything permanently.
Sinister Concierge
Nobody has mentioned this one but I think it's really interesting. It's cheap, you can play it whenever you want, it's hard to get rid of, and it kinda does the same thing that the limo does where it's either repeatable commander removal, repeatable...temporary creature gone-ness..., or permanent commander removal if you have a stifle and they don't return it to the CZ. And ofc since it's normally a temporary removal, it's not necessarily going to freak people out TOO much. The biggest downside is that we're not really going to run any sac outlets, so actually getting it to die might not be trivial. Ofc you can attack or block with it if you have a cooperator but that's functionally sorcery speed. You can kill it yourself, but you're probably better off just using the kill spell on the target unless it's indestructible or something. I want to figure out a way to abuse it because it's got some serious upside, but it might not quite fit? Idk. Really cool design, though.