Pay X mana, sacrifice X zombies, and then reveal cards from the top of your library until you reveal X zombies
Donning their detective best and brandishing the most sophisticated sleuthing tools, the gang is ready to put on their thinking caps, search for clues, and help crack the case
Since only one spell per turn is castable, counters are nasty, and thus an uncounterable draw win con here is powerful there and your dorks tend to be nasty size so you can go really big, really quickly
Of course, any creature can be legendary if you put a ring on it
I recommend non-alcoholic eggnog for this challenge, or things are going to get sloppy in a hurry