Deck Rules:
101.1 - All Colossus decks must meet a minimum of 75 cards to be considered legal.
102.1 - Each deck must contain a minimum of two colors.
102.2 - Colorless is not considered to be a color.
102.3 - A deck is considered multi-colored when at least two of the included colors meet a minimum of 4 cards for each of those colors.
103.1 - All cards must have a converted mana cost of 7 or over, except for noncreature artifact spells that tap for mana and have no other effects nor abilities. For example, Sol Ring is legal whereas Azorius Cluestone is not due to its second ability, which does not tap for mana.
104.1 - Cards with X in the mana cost must be paid with a minimum of 7 mana total. This does not mean that X itself has to be 7 mana or greater. For example, you can cast Secure the Wastes by paying the one white mana that is required and 6 mana of any color towards the X cost for a total of 7.
104.2 - Cards with XX or XXX in the mana cost must be cast with a minimum of 7 total.
105.2 - Cards with alternative mana costs that are less than 7, such as cards with suspend and morph, are legal as long as the original converted mana cost of the card is 7. For example, Maelstrom Djinn is legal, but Backslide is not.
While Playing:
201.1 - Each player begins the game with 60 life.
202.1 - The game continues like a typical casual, standard, or modern game and no changes have been made to the general gameplay.
More rulings will be added as questions and unintentional issues arise.The format was designed by mostly gusgrey and only a little bit by me. The written rules were edited and polished up by SecondRate.
All questions can be asked in the comments of this deck or on gusgrey's profile.