One thing to remember.. satan is a trickster! The KJV reads…
Revelation 13:16 KJV
[16] And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:
The false one causes many to receive a mark in their mind to be deceived by his teachings and a mark in their hand meaning they do his work because they think he is Christ.