Emrakul, the Promised End

The card types that could appear in your graveyard are artifact, battle, creature, enchantment, instant, kindred, land, planeswalker, and sorcery. Supertypes (such as legendary and basic) and subtypes (such as Human and Equipment) are not counted. The maximum discount that Emrakul’s own ability can provide is 9 generic mana .

If the targeted player loses the game while you control their turn during a multiplayer game, the extra turn never begins.

You only control the player. You don’t control any of that player’s permanents, spells, or abilities.