Thoughts: Lord creatures, such as Lord of Atlantis and Imperious Perfect, work well because they strengthen a board position that already exists. Rubblebelt Raiders works on the Keldon Warlord / Heedless One model—it gets larger when you have other creatures. Make no mistake—it can boost itself when it attacks, so even if you have no other creatures, it is attacking as a 4/4 on its first attack phase. However, without any sort of evasion, I just don't see Rubblebelt Raiders being good enough to displace Hellrider as the creature of choice to play in conjunction with a red-based attacking strategy.

Thoughts: The two comparable cards I would throw out against Signal the Clans are Intuition and Eladamri's Call. Signal the Clans is almost strictly worse than Eladamri's Call—and the Call was a solid $2 for almost two years after it was released. Granted, the Call is a $6 card now, but it took a decade for it to get there. The other comp is Intuition, and part of the charm of Intuition is getting three copies of the same card and intentionally putting two copies of that card into your graveyard. Long story short—while I think Signal the Clans is decent for Commander play, I think it's a little too inconsistent to have a high value in Standard, even if it sees some play. Should settle in the $1.50-$2 range.

Thoughts: You'd think that a targeted Smallpox (sacrifice a permanent instead of both a creature and a land) would probably cost about four mana, or maybe three if Wizards wanted to be aggressive and push a BBB mana cost. This is a targeted Smallpox at six mana; is cipher worth 2-3 extra mana on this effect? I feel the same way about Undercity Plague as I do about Stolen Identity—I believe cipher is going to be a force in Standard, and the effect should be viewed as a double-hit (BB4: Target player discards two cards, sacrifices two permanents, and loses two life), which can then be repeated turn after turn. I think many people will be off put by the high mana costs on these cipher cards, so they are starting at a low price. I also think that once people start playing with or against cards like Undercity Plague, they will see that cipher is the best of the five mechanics in this set, for Constructed play.

Thoughts: An expected price increase for a premium mill card; there's talk about this seeing play in Legacy for anti-Belcher tech, but wouldn't Mind Funeral already fill that role if that card is worth playing?