Thazier, the Void's Eye

You can cast Thazier, the Void's Eye from your graveyard or exile for as long as it was exiled
from a source you control and it costs {1} less
to cast for each void counter you have.
Whenever you cast Thazier, the Void's Eye or a
spell from exile, you get a Void counter.
Thazier, the Void's Eye's power and toughness is
equal to the amount of Void counters you have.