Caged Sun 178 (The List Reprints)

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.

NM - $6.40
LP - $5.10
MP - $3.90
HP - $2.60
DMG - $1.50