Mark of the Highlander

Regalia cards does not count in your starting deck.
You may begin the game with Regalia cards
in your command zone.
This creature is an original Elder Dragon. If it is
your commander, the commander tax doesn't
apply to it. If it does 21 total combat damage to a player in a give game, this player loses the game.
(Your commander may normally bear only one
of each type of Regalia)