Shield of the Oversoul

{2}{g/w}

Enchantment — Aura

Enchant creature

As long as enchanted creature is green, it gets +1/+1 and is indestructible. (Lethal 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.