Margarita, Avid Manipulator

When Margarita enters the battlefield, target
opponent becomes your confidant as long
as Margarita remains on the battlefield. (You and
your confidant each draw a card at the beginning of
your upkeep. Your confidant's spells cost {1} more to
cast. Prevent all damage you would deal to your
confidant.)
{2}, Reveal your hand: You become Margarita's
confidant. Any player may activate this ability
and only as a sorcery.