Emeria, Cardcaster

Poisonous 1
When Emeria, Cardcaster enters the battlefield,
players play a Magic Subgame starting at 1 life,
using the top twelve cards of their Library as
their decks. The winner of the Subgame exiles
their original library, and chooses twelve
permanents from any subgame library. When the
original game resumes, those permanents are cast
without paying their mana costs, under the
subgame winner's control.