Alex, Book of Souls

{3}: Put a blank counter on this card.
Then, add one colorless mana for every counter.
If it has three or more tokens, it gains hexproof
{10}{b}{b}{b}: Lose 7 life points and destroy all cards. Summon Alexynthia
I was a fool to think its power limited.
Sol, wherever you may be,
kill it while you have the chance
-Los Tynan