Tae-Illya, Puppeteer Ascended

Opponents don't lose the game from having
10 or more poison counters.
You control each opponent who has 15 or
more poison counters.
Creatures you control have "When this
creature enters the battlefield, proliferate."
When you control all opponents, you win
the game.
"What do you have, including your own free will,
that I cannot obtain?"