Teleris, the Unconquered

Teleris, the Unconquered can't be pillaged.
{t}: Add {w}. If this Settlement is populated,
create a 0/3 white Wall creature token with
defender.
Population 4 (Whenever you spend mana produced
by this land to cast a creature spell, put a population counter on this. Then if it has four or more population counters, it becomes populated.)