If you miraculously make it deep into the event your life will be easy, but do you want to be the one person playing Ad Nauseam who gets the lucky pairings early on and dodges just enough Liliana of the Veil decks to make it there
9 Mewtwo Lv
Once you reach the phase of the game where you can afford to do multiple things per turn, you need card draw to ensure you keep having things to do (Circle of Power, Fight On!, Travel the Overworld) or at least cards which can be used multiple times (flashback spells, Ring of the Lucii, Shambling Cieth, Relentless X-ATM092)
Remember that the copy goes on the stack above the original and resolves before it
Lets wrap things up with some cards that almost made the list: Winds of Abandon (Modern Horizons) While a sorcery speed Path to Exile for 2 mana isn't incredible, the overloaded version of this spell can be absolutely back-breaking, especially against decks with few basic lands
Obviously, Modern is full of noncreature spells and were hoping to play this unfairly by including a variety of sources of lifegain to counterbalance the damage we may take from this Human Noble Ally