Unwanted Remake: This is no Path to Exile, but it's very general-purpose, and it fills a similar role to Condemn in being a lot better in decks that aren't attacking.

Enduring Innocence: It's always such a relief to kill than Vampire, so having it survive seems very strong. The body is worse here, but that's not necessarily a bad thing—low-to-the-ground decks maybe shouldn't get such a good blocker with such a big upside.

Consider: There are plenty of ways to get stuff into the graveyard now, so the surveil on this isn't as crucial as it once was.

Enter the Enigma: I think this is interesting as a cantrip to support the concept of unblockable synergy in blue, and Headliner Scarlett has proven that blocking control is very powerful. We'll see if it's good enough.

Witness Protection: Sad to lose "Legitimate Businessperson".

Emrakul's Messenger: Not awful, not great.

Silent Hallcreeper: This seems strong, wowee. Excited to have some more good food for blue unblockables

Stoice Sphinx: This wasn't bad when it showed up, but it wasn't showing up frequently and it wasn't good enough to push the metagame in any particular way.

Mulldrifter: This card is definitely not bad, but its rate is beginning to show its age and even in decks that can recur stuff it's rarely the best thing to do. With a much better option for doing largely the same thing now available, it's time to say farewell, old soldier.

Overlord of the Floodpits: Largely the same thing as Mulldrifter but better. Obviously casting this is substantially worse when you cast it on 3 (unless you want to discard something), but getting a creature out of it later on is a huge boon.

Enduring Curiosity: An unblockable reward and an evasive beater that's annoying to get rid of for good? Sign me up!

Unholy Annex // Ritual Chamber: This isn't obviously better than Arena, but the flexibility to do something useful with it when you draw it at low life is quite nice, and I do like this effect to be it's more splashable.

Archon of Cruelty: Get dehorizonized ya big galoot

Norin, Swift Survivalist: I'm curious how well people can end up using this ability.

Augur of Autumn: This is getting outclassed to some degree, and more than that it's just not an angle that really needs help in green right now.

Hauntwoods Shrieker: This seems really strong. It's good in beats and it's great in cheats. Not making a guy when it enters is a risk, but it's a risk that's viable for a three-drop.

Chained to the Rocks: I do like how this card plays a lot, but with creature removal getting better in general it's less and less interesting. Better to have fun stuff in the multicolor slots.

The Jolly Balloon Man: This having haste is a big game when you've got something to clone with it.

Copperline Gorge: Keeping this in over Thornspire Verge because having access to turn one G is so important to green decks.

Drowned Catacomb: Keeping this in over Gloomlake Verge because UB cares more about having more reliable color access in the long game than being able to play on curve.