Extra Turns in EDH

Make a deck that forces them to answer you instead of the other way around.  Make something hyper aggressive, or something that hates on their strategy.   Let them be on the receiving end of it.  If nothing else you'll force more interaction, and the interactions are what make the game fun.  You don't want to sit there and play a solo game just as much as you don't want to watch them do it.  Run cards like Red Elemental Blast and Stranglehold main deck, or run something with blue and SpellJack their extra turns or Memory Lapse/Lapse of Certainty them.  Better yet, put Memory Lapse or Abeyance on an Isochron Scepter and Time Walk them for a while.

edit:

You can force them into only one spell per tun (they can still gain tempo but much less) Arcane laboratory and rule of law do this. 
You can play aggro that hates on control Gaddock Teeg and Dosan the Falling Leaf come to mind
You can answer extra turn spells directly (see above stranglehold suggestion)
You can play control/tempo
You can play winter orb/stax

Last edited by gumgodMTG (2013-09-21 19:48:28)

Orim's Chant is the white Time Walk.    Put that on a scepter.  Note that you can kick it when casting from the scepter as well.   Abeyance and Silence are also good cheap options.

Also Stranglehold is a great card for turning off fetch lands, so it's never a dead draw.

Last edited by gumgodMTG (2013-09-22 13:28:24)

I know this post is kind of old but here are some cards That I always found useful for when My friends take extra turns.
Bitter Ordeal, Curse of Echoes, Echo Mage, Fork, Mischievous Quanar, Reverberate, , Spelltwine, Twincast, Wild Ricochet
Might not be the best choices but when you are taking extra turns when they are they will pretty much stop