Maria of the Astral Clocktower

First strike, undying
Whenever Maria of the Astral Clocktower deals
combat damage to a player, each opponent gains
an emblem with "At the beginning of your
upkeep, this emblem deals 1 damage to you", and
you exile the top card of each opponents library.
Until end of turn, you may play those cards, and
you may spend mana of any type to cast them.