Yoshimaru, Ever Faithful 
Legendary Creature — Dog
Whenever another legendary permanent you control enters, put a +1/+1 counter on Yoshimaru. Partner (You can have two commanders if both have partner.)
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL