The Crystal Cycle Taking a cue from the cycle of Medallions, we have the cycle of Crystals, which at least casual EDH decks will be interested in playing
However, even with the addition of these black cards to your deck, your color identity remains mono-blue, so your Command Tower could not produce black mana, for example
All you are getting is two 4/4s for 7
Here is my top ten Simic cards for cube play: 10
The inability to block is going to matter in damage races, so Bloodfeather Phoenix will be worse the more likely you are to play an aggressive mirror in a Cube, but we often see the aggressive decks off on their own islands in the digital Cubes, and in those environments, cards like this are great
But there have been a couple revelations that have shaped my entire Magic thought process