No Mans Land

At the beginning of your upkeep, put a extermination counter on No Mans Land.
{1}{b}{g}: Put a extermination counter on No Mans Land or remove a extermination counter from it.
When No Mans Land has three or more extermination counters on it, sacrifice it. If you do, destroy all nonland permanents.
"Iamque non pugna, sed caedes erat."
-Roman proverb