Both players can effectively draw as many cards as they want
To get started, you need Phyrexian Altar on the battlefield, Reveillark in your hand, and Karmic Guide in your graveyard (which is easy enough to do with its Evoke ability)
Its a rare, though, and its worth reminding everyone yet again that these cards will not have any demand from Standard or Modern players
Another use is other sacrifice lands like Wasteland or Ramunap Ruins or Scavenger Grounds and get another crack from this
Now all you have to do is flat all of your mana, pay two and tap Isochron Scepter to cast a copy of Dramatic Reversal, which untaps all your permanents including Isochron Scepter and those mana sources you just tapped
Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents of their choice.) Illustrated by Jason Felix Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp