That player takes an extra turn after that one
Still, its a very strong effect, and generally speaking, youre playing these effects to stop one alpha strike or dismantling of your board, and not concurrent ones
Nobody turns down free cards in EDH, and you should get the better end of the deal, especially if you reliably cast two spells a turn
It comes with the Lord of the Pit rider, so wed want to make tokens for the sacrifice or pick one of the commanders that likes a graveyard strategy
A land that taps for 3 mana is rife for all kinds of shenanigans, as several combo decks in Pioneer and other formats prove
If you decide to take Show and Tell early and move in on cheating big threats onto the battlefield, lean toward a pairing with green and see if you can pick up Eureka