Primeval Protector
Creature — Avatar
This spell costs 
less to cast for each creature your opponents control.
When this creature enters, put a +1/+1 counter on each other creature you control.
The earth shook in support of their cause, offering a champion of its own.
Jaime Jones
Neon Dynasty Commander (NEC)
• #124Rulings
Primeval Protector's ability can't reduce its cost below {G}.
(wotc • 2016-11-08)
Once a player has announced that they are casting Primeval Protector, no player may take actions to try to change the number of creatures your opponents control in order to increase its cost.
(wotc • 2016-11-08)
Rulings
Primeval Protector's ability can't reduce its cost below {G}.
(wotc • 2016-11-08)
Once a player has announced that they are casting Primeval Protector, no player may take actions to try to change the number of creatures your opponents control in order to increase its cost.
(wotc • 2016-11-08)