Star, Strathmore Prodigy

Lifelink
Whenever you cast a black instant or sorcery
spell, gain life equal to that spell's total converted
mana cost.
At the end of each turn, if you gained six or more
life this turn, create a 1/1 zombie token with "sacrifice this creature: add {b}{b}. Use this mana
only to cast black instant or sorcery spells."