All three of this butler bot's abilities will help you out in a Captain America deck, which you'd have to be very foolish not to build around equipment
cards, the value of Shifting Shadows depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Structure Deck: Invincible Fortress)
I put each one through the test of four formats: Modern, Draft, Commander, and Penny Dreadful, each format being different in its own way and having different requirements
Artifacts Matter In addition to Sai and Padeem, there are all sorts of other interesting options here
This card is a fine addition to any Constructed deck looking to cash in on coin flips, but it's a lesser option than some of its counterparts like Crash Through and Charge Through