Rules 3 and 4 serve precisely to break this logic in Commander and promote unpredictability and diversity in the game
As for Standard-viable cards, I could see Cloud, Midgar Mercenary maybe getting some play, since it has a low cost and can tutor for useful tools
, , Remove a charge counter from this artifact: Create a 1/1 green Phyrexian Insect creature token with infect
Every color combination and theme element you choose to include should have a clear archetype
In a blue-red deck, if this card survives, you get to do nice things like draw a bunch of cards or deal a lot of damage via burn spells
In the hands of an experienced player though, a well-timed Counterspell can end the game on the spot