Jaylean, Fragile Haunt

As long as you control another black creature
and a forest, Jaylean can't be destroyed by spells
you control.
Whenever another creature dies, create a 4/4
black nightmare creature token.
When Jaylean dies, you may exile her. If you do,
create a number of 1/1 white spirit creature
tokens with flying equal to six plus the number
of creatures that died this turn.