Destroy any number of target planeswalkers.
Maybe this goes without saying, but 0 is a number. 
@smmenen Good read! Very cool with a tool that can measure diversity. Seeing is believing.
My only critique of your article would be that it wasn't immediately obvious that you flipped the index. You wrote
Recall that a higher value indicates a more balanced and more diverse metagame, and a lower number indicates a less balanced and less diverse metagame, with .99 being a nearly perfectly balanced and diverse metagame with a plethora of viable decks, and a value closer to 0 being a metagame dominated basically by a single deck.
But for that sentence to make sense, you would have to have read the endnote as you make no mention above of why this changed.
You're not cutting a creature in the matchups you bring in Gisela or the dragon. That feels incorrect. I think Muldrotha's out vs. shops and Xerox.
I would probably cut an Island vs. at least dredge.
Maybe @brianpk80 can answer this better, but I think you can cut a number of oaths in the PO matchup.
Depending on the flavour of dredge, I think you can cut 0-2 FoW.
Copying a Rune-Scarred Demon might have some value. Or something you stole with Dack.
@forceofnature I saw this and decided to dust of my math skills.
F(n): Number of copy effects after nth Bonus Round.
- F(0) = 0
- F(1) = 1
- F(2) = 1 + 1 + 1 = 3
- F(n) = 1 + F(n-1) + F(n-1) = 1 + 2*F(n-1)
Everytime you play BR you get
- one extra copy effect for the spell: 1
- one extra copy effect for every previous one: F(n-1)
- all the previous ones: F(n-1)
Which is a really complicated way of saying playing an instant or sorcery after the nth Bonus Round will put it's effect on the stack 2^n times.
How will Yawgmoth's Bargain or Necropotence affect Sagas? Is it literally "after your draw step" or is that a shorthand for "beginning of your pre-combat main phase"?
@chase_dagger It's to accentuate alpha corners. Plus a lot of people use black sleeves, and accidental theft of your opponents creatures (because Animate Dead) is a real thing. Especially when you've had a couple of beers. A third reason is that beat up edges look more crisp.
This is my pile of oldschool cardboard. Still got some white bordered eye sores, but I'm slowly getting there. The Volcanics are altered unlimited. Bought them from a drunk friend because I was drunk.
I ran into an interesting pile with Bazaars and Squee, Goblin Nabob a couple of months ago. I think the rest of the deck might have been Goblin Welders and gearhulks.