Didn't find anyone mentioning this, so here goes: these customs seems a bit narrow in here, since there isn't enough actual targets for them (solar flare only targets artifacts and Matter Reshaper, Shrine Maiden has 0 targets):
1 stands for generic mana, which isn't any color... designers probably were aiming for hybrid mana for every color ?
Cards I would cut, because i can't see them doing that much or aren't that interesting:
Fabled Hero <- not enough targets, 2/2 double strike isn't that exciting, where is Silverblade Paladin?
Shrine Maiden <- if you play it literally, it has no targets, but i think that even with targets for every 1 drop sorcery or instant in your cube, it isn't that exciting to me.
A LOT worse than Snapcaster Mage(which you have in your cube), not to mention white has a lot of good 2-drops available.
I would push the power level more so i would add it in this cube or my cube.
Runed Halo <- why? protection against 1 thing, costs WW, so not that many decks would add it. I would take this card out in a heart beat.
Scourge of Nel Toth <- 5BB 6/6 flying isn't worth it and sacrificing two dudes seems way too expensive for the gain.
Kird Ape, Viashino Slaughtermaster <- i dislike these guys in a red slot, since they are multicolored. Kird Ape not that exciting in the RG slot or the red slot. Viashino is pretty horrible without the GB boost and not that exciting even when you get the 3-colors for it.
Root-Maze Enchantress is a sweet card, don't get me wrong. It doesn't have any real application in this cube though. You need a strong enchantment theme for this card to work in your favor.
Void Grafter <- this effect loses to Mystic Snake in so many ways, where's Mystic Snake?????(not sure if you noticed i like Mystic Snake)
EDIT:
Doomsday + Laboratory Maniac seems out of place. Your cube has a low curve and it seems you will have a lot of fast decks, so i can't imagine anyone winning with Doomsday, not to mention it being really hard to pull off in any cube.
I would call Doomsday a trap in this cube.
1 stands for generic mana, which isn't any color... designers probably were aiming for hybrid mana for every color ?
Cards I would cut, because i can't see them doing that much or aren't that interesting:
Fabled Hero <- not enough targets, 2/2 double strike isn't that exciting, where is Silverblade Paladin?
Shrine Maiden <- if you play it literally, it has no targets, but i think that even with targets for every 1 drop sorcery or instant in your cube, it isn't that exciting to me.
A LOT worse than Snapcaster Mage(which you have in your cube), not to mention white has a lot of good 2-drops available.
I would push the power level more so i would add it in this cube or my cube.
Runed Halo <- why? protection against 1 thing, costs WW, so not that many decks would add it. I would take this card out in a heart beat.
Scourge of Nel Toth <- 5BB 6/6 flying isn't worth it and sacrificing two dudes seems way too expensive for the gain.
Kird Ape, Viashino Slaughtermaster <- i dislike these guys in a red slot, since they are multicolored. Kird Ape not that exciting in the RG slot or the red slot. Viashino is pretty horrible without the GB boost and not that exciting even when you get the 3-colors for it.
Root-Maze Enchantress is a sweet card, don't get me wrong. It doesn't have any real application in this cube though. You need a strong enchantment theme for this card to work in your favor.
Void Grafter <- this effect loses to Mystic Snake in so many ways, where's Mystic Snake?????(not sure if you noticed i like Mystic Snake)
EDIT:
Doomsday + Laboratory Maniac seems out of place. Your cube has a low curve and it seems you will have a lot of fast decks, so i can't imagine anyone winning with Doomsday, not to mention it being really hard to pull off in any cube.
I would call Doomsday a trap in this cube.
