Currency Converter - Repeated card filtering is very powerful, and the ability to turn that into treasures or repeated creatures is maybe good enough without being degenerate. History warns me these engines end up slightly more expensive than I would like.

Raffine's Guidance - I said as much in my pauper cube review - this isn't as good as Rancor, but I really like Gryff's Boon, and I might really like this. Solving the aura problem by not costing the aura is a nice perk.

Hypnotic Grifter - Weaker than similar blue card draw engines, but the potential to grow intrigues me. Lacking its own evasion hurts, but Blue isn't supposed to be the most broken color in the cube.

An Offer You Can't Refuse - Countering your own stuff for the treasure is probably going to be wrong, but this is a catch all against the bombs in this cube (are there any?) that aren't named Allosaurus Shepherd.

Cutthroat Contender - Knight of the Ebon Legion and Death's Shadow have a new playmate. This is a slam dunk.

Goldhound - Menace and First strike are reasonable aggro keywords, but I think this is going to be most appealing as non-green color fixing. I wish WotC would stop asking me to sacrifice dogs.

Sticky Fingers - I like this as conditional card draw and psuedo evasion in one drop way more than I liked it for the pauper cube, but that cube has more consistent card draw in other colors. Here, it's probably key for the evasion against the decks that get tall instead of wide.

Unlucky Witness - This was a card I loved in the beginning of preview season and then fully forgot about. Being a vanilla on the front side and not controlling the impulsive draw are both downsides, but two cards is two cards.

Luxior, Giada's Gift - I don't think I have any broken combos with this, and I only have one planeswalker, but this is a spicy piece of equipment to get my hands on for futureproofing.

Ominous Parcel - A bad wayfarer's bauble and an expensive flame slash are both, honestly, very acceptable. I kind of like this.