Focal Gateway

Constallation -- Whenever Focal Gateway or
another enchantment enters the battlefield
under your control, remove a +1/+1 counter
from a spectre token you control.
Whenever a permanent you control is exiled,
create a 2/0 colorless spectre enchantment
creature token with a +1/+1 counters on it.
{w}{w}: Add a +1/+1 counter to a spectre token.