This is an EDH scenario. Player A plays Emrakul the Promised End and will control player B's next turn. During that turn, Player C kills Player A.

I am quite sure that player B regain control of the turn. But will there be an extra turn?

800.4d
If an object that would be owned by a player who has left the game would be created in any
zone, it isn’t created. If a triggered ability that would be controlled by a player who has left the
game would be put onto the stack, it isn’t put on the stack.
Example:
Astral Slide is an enchantment that reads, “Whenever a player cycles a card, you may exile target creature. If you do, return that creature to the battlefield under its owner’s control at the beginning of the next end step.”
During Alex’s turn, Bianca uses Astral Slide’s ability to exile Alex’s Hypnotic Specter. Before the end of that turn, Bianca leaves the game. At the beginning of the end step, the delayed triggered ability generated by Astral Slide that would return Hypnotic Specter to the battlefield triggers, but it isn’t put on the stack. Hypnotic Specter never returns to the battlefield.


The core is, is taking an extra turn to be considered a delayed triggered ability? Or is it an object? Or is the extra turn already created?

Edited Olle Liljefeldt (Feb. 19, 2017 02:31:03 PM)

The extra turn still happens. While a losing player takes all of the objects they own with them when they leave the game, any effects previously set up by the resolution of that player's spells and abilities remain in force.

As such, it doesn't matter that the player whose ability caused that turn to be taken isn't in the game any more, in the same way that if a player casts Silence in response to a lethal burn spell (so it resolves before they lose the game), that player's opponents will be unable to cast spells for the remainder of the turn, even with the player gone.