Sanea, Gifted Apprentice

When Sanea, Gifted Apprentice enters the battlefield and at the beginning of your upkeep,
choose target player. Sanea, Gifted Apprentice's
power is equal to the number of cards in target
player's hand.
{2}, {t}: Creatures your opponents control lose all blocking restrictions until the next end step.
(ie flying, protections, and unblockable)