This card was printed in the following sets:

Card Name: Symbol Set Block
Mikaeus, the Unhallowed Dark Ascension (Mythic Rare) Dark Ascension Innistrad
Mikaeus, the Unhallowed Ultimate Masters (Mythic Rare) Ultimate Masters Miscellaneous
Mikaeus, the Unhallowed Ultimate Box Toppers (Special) Ultimate Box Toppers Miscellaneous

This card has restrictions in the following formats:

Format Legality
Modern Legal
Legacy Legal
Vintage Legal
Commander Legal
x For more information regarding each format and play style modifications, visit the Banned / Restricted Lists for DCI-Sanctioned Tournaments page on the Magic: The Gathering website.