Elminster, Sage of Shadowda

Elminster, Sage of Shadowdale is also a cleric,
rogue, and warrior.
Eminence - When you attack with a full party, if Elminster, Sage of Shadowdale is in the command
zone or on the battlefield, you may exert the
party. If you do, tap them and venture into the dungeon.
At the beginning of your end step, untap up to
one of each party member.