Ahebi, Goddess of the Alusi

Ahebi enters the battlefield with X +1/+1
counters on it, where X is the number of Spirits
you control. Ahebi's power is equal to the
number of Spirits in your graveyard. Whenever
Ahebi's power is seven or more, she has double
strike and is indestructible.
As the seventh and final reincarnation of the mighty
female-kings of the Igbe tribe, Ahebi brought along
with her a powerful dynasty when she ascended into
the spirit world and godhood.