Across the board, the most expensive Magic promotional cards arent as expensive as the Yu-Gi-Oh
Flooding the board with tokens can be an effective strategy for dominating the game, especially in Commander, where you have the time to run powerful token doublers like Primal Vigor and Doubling Season
I've long maintained that stealing a creature from their side of the board and using it as our own is a two-point swing in our favor in the zero-sum game called "having creatures" and drawing a card to boot is just gravy
Maybe the most obvious home is Ad Nauseam, which can not only use Glorious End to buy an extra turn to win the game but can also just use it as a Time Stop with the help of Angel's Grace
She has a pretty high cost of 5 Ink (which can be reduced to 3 with Shift), along with 4 each of Strength and Willpower, plus 2 Lore
However, if the permanents entered in the opposite order, that opponent's maximum hand size would be seven minus the number of card types among cards in your graveyard if you had delirium