Soulflare Tomb

Whenever you cast a spell or activate an ability that requires black Mana to be cast or activated, you may place a Soul counter on Soulflare Tomb.
{x},{t}: Remove from Soulflare Tomb and/or from any number of Spirit creatures you control X Soul counters, and divide them among Souflare Tomb and/or any number of Spirit creatures you control. Don't put Soul counters on Soulflare Tomb if you payed black mana to activate this ability.