Ts'eh, Queen of Spiders

When a creature you control deals damage, gain life equal to that creature’s toughness
{2}{g}{t}: create a 0/2 enchantment creature token with “enchanted creature gets +0/+2 and {t}: generate {g}. Enchanted creature is a spider in addition to its other types.”
{5}{b}{b}. Target opponent loses X life and you gain X life, where X is the number of spiders you control. Activate this ability only when you would cast a sorcery.