Taghia, Black Oath's Origin

Indestructible
{b},{t}: Put a 1/1 black Assassin creature token with deathtouch onto the battlefield.
{b}{b},{t}: Creatures you control gain deathtouch until end of turn. Activate this ability only any time you could cast a sorcery.
{b}{b}{b}{b}{b}{b}{b}{b}{b}{b}: Spend only mana produced by basic lands on this ability. Each opponent looses 100 life. Activate this ability only any time you could cast a sorcery.