Sickening Degree

Exile the top card of your library. This spell
deals damage to you equal to that card's mana
value. Until the beginning of your next end
step, you may play that card. You may repeat
this process any number of times.
__________________________
She was told that one vial should have been enough
for her lifetime, but she still had many more.
Artwork source:
https://avasdemon.com/pages.php#1346