There are six to choose from, Emerald, Ruby, Amber, Amethyst, Sapphire, and Steel, and each type has different characteristics for its cards
The Emerald/Steel deck from Shimmering Skies, however, stands out from other decks in the way it uniquely draws on the cards revealed in the fifth set to help build up your board presence and damage characters
This card is basically never worse than a 0/2 creature that taps for one mana of any color
Be cautious of the anti-synergy between Spider Spawning and Rotwidow Pack, another staple of Spider Commander decks
On top of that, color can be used in more creative ways when artists dont have to worry about capturing something in a more photorealistic light
For example, if you have a three-drop Commander, they are playable on turn 3 with this triad