Mirthful, Jubilant Harlequin

Trample, Haste
Whenever Ethereal Trickster attacks,
you may exile targetopponent's library.
Until end of turn, you may play cards
exiled this way. You can spend mana
as if they are off anny collor.
"Watch closely! Behold the vanishing act of your strategies,
now replaced by the grand spectacle of chaos!"