While they generally work better in mono colored decks, they can be put into decks that lean heavily into one color over another
Whenever equipped creature dies, you may reveal cards from the top of your library until you reveal a creature card that shares a creature type with it
Despite the games plethora of big creatures, very few ever reach the pinnacle point of being the biggest
Creature Enchantment - Human Ninja Prosperous Thief Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever one or more Ninja or Rogue creatures you control deal combat damage to a player, create a Treasure token
As far as I could tell, they conformed to all the required specs for the size of a Magic card
In essence, every MDFC is a slightly overcosted spell combined with a slightly underpowered land (thanks to coming into play tapped or costing three life to come into play untapped, in the case of the mythic MDFC cycle, and only tapping for one color of mana)