Crown of Empires 
Artifact
, 
: Tap target creature. Gain control of that creature instead if you control artifacts named Scepter of Empires and Throne of Empires.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL