Marks (MK) This could take the form of a signature which was added at a later date, but any card with writing, ink marks, pencil marks, or evidence of the impression left from the act of writing will ensure a card gets the MK designation
Your alternative commander is Rendmaw, Creaking Nest, a new scarecrow that pays you off for playing cards with multiple card types
You're allowed to shuffle your opening hand back into your deck, draw a fresh seven, and keep all of them
The Takatsuki Hall of Fame also seems to be popular, but in addition to banning the cards excluded from official competitive play (sad bird noises), it has some custom rules
Commander (formerly EDH) is a Magic: The Gathering game type where each player plays with a 99- cards deck, led by a Legendary Creature: the Commander