Magneto, Master of Magnetism

Flying, menace
If a player controls an artifact, Rebels you control
have protection from that player.
Magneto's power is equal to the number of
artifacts you control.
When Magneto attacks, take control of 1 target artifact the defending player controls for as long
as you control Magneto.
"I have been marked by destiny. I will gladly face
any man, any nation, to protect my kind."