Since the current card list is still small I really only have one suggestion. Mark any "reprints" of actual cards with a * after the name. It will help anyone that only knows bits and pieces of magic card sets to see at a glance what is not custom.

After some time Cutthroat Maneuver saw print. While you can argue that it's strong because of heroic, and that its cost is a bit high, at the very least this should be uncommon. It can be very swingy.

Awesome.

Wow, this card could use some development. Elspeth, Knight-Errant is absurdly pushed, in part because a stream of 1/1s for +1 and a decent starting loyalty. But now they fly. That's not even counting that white is supposed to be good at token making while blue should be the worst at creatures in general.

The second ability is way too powerful at -1.

The design is okay, but I don't like the last ability a lot. If anything, because it seems like swarming and pumping is a white or green-white way to win. An X/X Invisible Stalker token, with X being your Illusions would be bluer.

This card is very bomb-y for common, but it's definitely awful for rare.

What about a super Lobotomy? Like, 'When ~ deals dmg to an opp, search that player's library, graveyard, and hand for a nonland card and all cards with the same name as that card. Exile them. Shuffle that library.'

There's also "Giving an archtype exactly what they want = Rare" argument, which I could dig. I'm pretty sure there are some players who would love to have this card. Those players would treat the card as special, and rareness denotes specialness.

Oh, and I suppose there's the precedent argument. Specters with evasion are almost always rare. You could make this uncommon, sure. But then future specters with evasion could now be uncommon. The next time you print a new riff on Hypnotic Specter, if it wasn't uber-powerful, players would complain that it should have been uncommon. I don't know how much I follow this logic, but it seems like a valid argument.

Personally, I think the card could be either uncommon or rare, depending on how many 'must-be-rares' end up in the set. I'd probably promote this as an uncommon that with the hashtag "Most likely to become rare when something falls out of the file."

I don't think an unblockable Scroll Thief would be common. In fact, there have only ever been three creatures with both unblockable and a saboteur ability. Ferropede was uncommon, but had a much more minor effect; the other two - Ghastlord of Fugue and Higure, the Still Wind - were rare. In fact, this is quite like a smaller Ghastlord of Fugue with an alternate option too.

­Scroll Thiefs are common. Specters are often rare because they put more awesome abilities (and, okay, Hippie still is), but the most straightforward can be uncommon (even when they all fly and everything). Since you only do one of the two, its awesomeness is capped.

Or maybe the Dimir want me to underestimate it. o.O

Whoa, you reckon? That's a pretty spicy pair of abilities.