New Argive welcomed the kor people when they were displaced by the Rathi overlay. The kor repay that kindness with fierce loyalty.

Argivian Phalanx

This spell costs {1} less to cast for each creature you control.
Vigilance (Attacking doesn't cause this creature to tap.)

Foundations Jumpstart

Dominaria United

This spell costs {1} less to cast for each creature you control.
Vigilance

Argivian Phalanx’s first ability can’t reduce the {W} in its cost.

To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying, add any cost increases, then apply any cost reductions (such as that of Argivian Phalanx). The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.