The 30 mythic rares from The Big Score can also feature in the vault frame
Or using a Banishing Knack effect to bounce things at that same rate
I'm willing to admit that might have been greater problems with my cube design, but meh
I'm going to go out on a limb and say that anything more than three mana is too much mana for library manipulation in Commander
10 Tajic, Legion's Edge Retro Frame - Serial Numbered - foil - $93.66 A legendary creature in the Boros guild, Tajic is an ideal commander and a strong card in Modern and most red and white aggro decks

Now, I could try to explain in my own words what that means or how they work within the rules, but that has proven dangerous in the last few weeks (did I mention that when you use a splice ability the card remains in your hand?), so instead I will refer you to the Champions of Kamigawa FAQ: Flip Cards The Champions of Kamigawa set contains ten "heroes" that are easily recognizable by their unique card frame: Akki Lavarunner -- Tok-Tok Volcano Born Budoka Gardener --Dokai, Weaver of Life Bushi Tenderfoot --Kenzo the Hardhearted Initiate of Blood --Goka the Unjust Jushi Apprentice --Tomoya the Revealer Kitsune Mystic --Autumn-Tail, Kitsune Sage Nezumi Graverobber --Nighteyes the Desecrator Nezumi Shortfang --Stabwhisker the Odious Orochi Eggwatcher --Shidako, Broodmistress Student of Elements --Tobita, Master of Winds You ignore the information on the bottom half of the card until the creature in play "flips" when certain heroic conditions are met