Ratr, conniving messenger

Each player reveals all cards that they draw.
whenever an opponent would draw a card
they instead draw two and you choose one,
that player exiles the chosen card with an
acorn counter on it.
players may cast cards they own from exile
with acorn counters without paying their
mana cost, cards cast this way can only target
a permanent or player that neither you nor
the player that owns the card controls.