Caged Sun is a mythic Artifact card from Magic: The Gathering (The Brothers' War Retro Artifacts, BRR).
Mythic
The Brothers' War Retro Artifacts (BRR)
{6}
Mana Value
6
Card Text
As this artifact enters, choose a color.
Creatures you control of the chosen color get +1/+1.
Whenever a land's ability causes you to add one or more mana of the chosen color, add an additional one mana of that color.
