Matriarch of Sruulah

Defender
At the beginning of each upkeep, you may look
at the top card of your library and exile that card.
{t}: You may cast the card exiled by Matriarch of Sruulah without paying its mana cost, then lose
life equal to its converted mana cost.
{ut}: Put a -1/-1 counter onto Matriarxh of
Sruulah.