There's such a wide range of spells that count towards cascade with this elder dragon, that you'll develop a refined taste to enjoy solving for the unknowns
9 High Avatar Garunix Is a Reusable Dark Hole Onslaught of the Fire Kings Structure Deck Feb
End of Match Procedure - Single-Elimination If the Match does not finish within the round time limit, the result will be decided by the following End of Match procedures: Single-Elimination End of Match procedures should follow these three (3) rules: Rule #1: If time is called while Duelists are in the middle of a Game, the current Game must have a decision (Win, Loss, or Draw) Rule #2: Once the current Game has concluded with a decision, determine the winner of the Match by determining the number of Game Wins (or Game Losses) each Duelist has for the current Match
Not to mention also quite good in Modern, as part of the Hammer Time archetype
That said, you can win without your commander, and while that's easier to do after Yidris has dealt damage to an opponent, the deck is more than capable of winning without it