The Mad King

If a creature dying causes a triggered ability of
a permanent you own to trigger, counter that
ability. If an ability is countered this way, you
may copy it and choose new targets for the copy.
At the beginning of each opponent's upkeep,
that player searches your library for a creature
card and puts it onto the battlefield under their
control. If they do, The Mad King fights that
creature. Then shuffle your library.