Priest of Fallen Souls

Linger (When this creature dies, you may exile
it. If you do, create a token that's a copy of it, except it's 1/1, it's a Spirit in addition to its
other types, and it has flying.)
Whenever another creature enters the battlefield under your control, put a +1/+1 counter on it. Priest of Fallen Souls deals 1 damage to you.