maybe "everything" is a legitimate choice
Sideboarding goes as follows: +1 Time of Need +1 Rending Vines +1 Heros Demise +1 Ink-Eyes, Servant of Oni +3 Pithing Needle +1 Cranial Extraction -1 Hideous Laughter -1 Exile into Darkness -2 Kokusho, the Evening Star -1 Myojin of Nights Reach -1 Wear Away -2 Senseis Divining Top For games two and three, you have a second and third Ink-Eyes (Time of Need is number three
Pongify, Crib Swap, Beast Within, and friends: While Ink-Treader Nephilim makes all removal targeting it a board wipe, we want creatures on the board to get that crazy value, so these give everyone some dinky monkeys or lizards to draw 20 cards off of with a Stun after a board wipe
Don't forget about Augur of Bolas and Disciple of Bolas, too
This construction establishes that Magic: The Gathering is the most computationally complex real-world game known in the literature, they say