Shield of the Oversoul 242 (Shadowmoor)

Enchant creature As long as enchanted creature is green, it gets +1/+1 and has indestructible. (Damage and effects that say "destroy" don't destroy it. If its toughness is 0 or less, it's still put into its owner's graveyard.) As long as enchanted creature is white, it gets +1/+1 and has flying.

NM - $4.40
LP - $3.50
MP - $2.60
HP - $1.80
DMG - $0.90