Pompous Battlemage
This is a goblin with prowess that's a cheap discard outlet. It almost fits my cube too well. Like a custom card. I just would've tried to avoid prepare still. And not make him look like he's wearing a bowtie.
If Jace was really aiming for a perfect multiverse, he should...
I think Empower Jace is a neat mechanic. It makes much better use of the amass design, I mean only creating a jace when you don't control one. Flavorwise it's a natural fit and a very clever way to have the key antagonist be present in every limited game. It also let's you loyalty up your real...
Tromp the Domains
All Sun's Dawn
First inclination was to pick All Sun's, but I have a tendency to put too much value cardd and too little stuff that actually ends the game into my cube.
I always end up wanting Izzet Charm. Having Quench as a baseline is just super solid, and both other modes are very potent in the right situation as well. It's also as cheap as a gold card can be.
Some sweet suggestions. I think I'll go with Reef Worm. Really neat with a free sac outlet, but it should also work fine as a finisher in blue-based control decks with at least a couple of boardwipes.
I am looking for a couple of blue cards that would make you splash them into your black based sacrifice deck (cards can be mono {U} or {U/B} gold). They are allowed to be higher powered than my CCC cards, it's for a new cube project.
Oh, and no UB for this cube.
Thoughtseize
How's the queen of discard spells in lower powered cubes? It's a 1 for 1, trading down in mana and life ... but it can really mess up a curve, right? And even without fast combo kills, decks have key cards, don't they?