Canon 1D X Mark II has a Canon EF lens mount and currently there are 200 native lenses available for this mount.
Canon 1D X Mark II doesn't have a sensor based image stabilization system but 57 of these lenses already comes with optical image stabilization.
Since Canon 1D X Mark II has a Full frame sensor, it has a focal length multiplier of 1× so lenses will provide their original focal length on 1D X MII.
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Canon 1D X Mark II Lenses with Image Stabilization
Canon 1D X Mark II Lenses with Weather Sealings