The Circle of Loyalty

忠誠の円環 (The Circle of Loyalty) (ja)

Legendary Artifact (CMC 6)
This spell costs less to cast for each Knight you control.
Creatures you control get +1/+1.
Whenever you cast a legendary spell, create a 2/2 white Knight creature token with vigilance.
, : Create a 2/2 white Knight creature token with vigilance.