There are 56 Secret Rare cards in the Mega Evolution set
The Battle of Pelennor Fields by Tyler Jacobson Digital God, it's busy
You won't always be able to get both Madam Mim and Fairy Godmother to stick on the board long enough to pull this off, but with their reduced Shift cost of three and two-ink respectively, you'll likely get both of them down on the board at the same time fairly often
If multiple creatures deal combat damage to you or an opponent at the same time, the appropriate ability of Strixhaven Stadium will trigger that many times
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In Innistrad: Crimson Vow last year, we got a card called Bleed Dry, which is a random, forgotten uncommon that is the same as the front side of Invasion of Innistrad but with the upside of exiling the creature that it kills, and cards like Tragic Slip and Tragic Fall do the same thing for one or two mana if their morbid or hellbent conditions are met