Betraying Lifecaster

(If {b/g}was paid with {b}, this creature is black and green.)
Landfall - Whenever a land enters the battlefield under your control, if Betraying Lifecaster is black, create a 2/2 black Demon creature token. Otherwise, create a 1/1 green Saproling creature token.
Demons you control get -2/+2.
Whenever a demon enters the battlefield under your control, it deals 1 damage to Betraying Lifecaster for each demon you control.