We know that for a fact thanks to PleasantKenobi, the patron saint of 1 Tix Commander
You may steal a green dork that requires a green activation cost in your Izzet deck
You can even add your own rules - Ive seen a friend play with a cube where you have to bet cards from your draft pool each match, similar to Magics forgotten Ante mechanic, winning cards from the other players as you continue on
It's perfect for the kitchen table, and I suspect a lot of people are going to run it because it's a random effect and they want to see which critter survives
For example, you could tap a creature with cycling and Tazri's ability for mana
She reduces the cost of playing a face-down creature each turn, and if you have a critical mass of morphs, youll be drawing tons of cards