Consider the Commander Legends card Wheel of Misfortune:
Each player secretly chooses a number. Then reveal those numbers. Wheel of Misfortune deals damage equal to the greatest chosen number to each player that chose it. Then, each player who didn't choose the smallest number discards their hand, then draws seven cards.
Suppose that Alice and Norman are in a two-player game. Alice casts Wheel of Misfortune on her turn. Suppose further that each player would like to wheel, and also that each player is functionally immune to damage (e.g. can't take damage, can't lose the game, or life total can't change). Then each player wants to choose a higher number than the other.
The comprehensive rules state:
107.1c If a rule or ability instructs a player to choose “any number,” that player may choose any positive number or zero.
How may Alice and Normal specify their numbers? In what format?
I would presume that each player should write the number down on a piece of paper. The obvious way to do this is by writing the number out digit-by-digit. But the rules don't seem to require this. If a player wrote “a million”, would this be an illegal choice? If not, then what about “a googolplex”? What about “Graham's number”? What about mathematical notation, such as “10^100”?. (If Alice and Norman are both, say, theoretical computer scientists or set theorists, then things could get really complicated.)
And how long do they each have to specify a number? According to the rules, they choose consecutively in turn order. How long may Alice spend writing down a number? At what point would it become slow play? Then, how long does Norman have? He clearly has a legitimate in-game reason to take longer than Alice took (even though in a perfect world he shouldn't have any information at all about Alice's choice).
I'm interested in any of the following:
- Concrete citations to the comprehensive rules, tournament rules, official rulings, and so on.
- Real-world experience of how this has been handled in practice.
- Opinions of judges or other official/semi-official sources about how such a situation might be handled.