Androl Genhald

Flash
When Androl Genhald enters the battlefield
during the declare attackers step, you may
reselect which player or Planeswalker target
attacking creature is attacking.
{5},{u}: Exile target nonland permanent.
"All men are ignorant, Aes Sedai. The topics of our ignorance may change, but the nature of the world is
that no man may know everything."