(Theres no set number of players needed for the opposing team, but in both the 2010 Archenemy release and the new Archenemy Anthology: Nicol Bolas release, the decks and schemes have been balanced to work best with three opponents vs
This ability triggers if the chaos symbol is rolled on the planar die (see rule 901.9b), if a resolving spell or ability says that chaos ensues, or if a resolving spell or ability states that chaos ensues for a particular object
The life loss is worth running a card that can eke out the last 12 or 16 cards of someone's library
Be a little careful with Karazikar though, since it isnt a may effect, and you can potentially trap yourself in a situation where an opponent has a bunch of creatures, and you end up taking too much damage
D-Tiercards that clearly should not be unbannedbreaks down pretty neatly into a handful of different groups along with a couple of outliers
We wouldnt play a 2/2 haste for three, of course