Zerena, Passionate Astrologer

Accelerate {3}{u} (You may cast this spell for its Accelerate cost. If you do, this spell becomes an
Enchantment with, when all players play with the top
card of their library revealed.)
{3}{r}: All players exile the top card of their
library. Activate only once per turn. If the top
card of each player's library is revealed, Zerena
deals 2 damage to all other players.