Animated Shield

Flash
When this artifact enters the battlefield, attach it
to target creature you control. If you do not,
sacrifice this artifact.
Equipped creature has Indestructible and "On
your upkeep, you may pay {2} and pick a color;
until your next upkeep, this creature has
protection from that color."
You may pay {w}{g/u} at any time and return this
card to your hand. If it was in your graveyard or
exile, you lose 2 life.