Mirror Box 250 (Kamigawa: Neon Dynasty)

The "legend rule" doesn't apply to permanents you control. Each legendary creature you control gets +1/+1. Each nontoken creature you control gets +1/+1 for each other creature you control with the same name as that creature.

NM - $9.10
LP - $7.30
MP - $5.50
HP - $3.70
DMG - $1.90