Siraya, of 40,000 Souls

Whenever a creature dies, put a soul counter on
Siraya, of 40,000 Souls.
{w/b}, Sacrifice Siraya, of 40,000 Souls: Create a
1/1 white and black spirit token with flying;
then create a 1/1 white spirit token with flying
for each soul counter on Siraya, of 40,000 Souls
I am never alone, even my mother will be with me till
the end.