Iron Crown

Regalia cards does not count in your starting deck.
You may begin the game with Regalia cards
in your command zone.
As long as your Commander has two of fewer
color identities, you may build a 50 cards deck
instead of a 60 card deck. (a 50 card deck would contain 21-22 lands and 28-29 spells)
(Your commander may normally bear only one
of each type of Regalia)