Isamaru and Yoshimaru 
Legendary Creature — Dog
Whenever another legendary creature or creature with mana value one enters the battlefield under your control, put a +1/+1 counter on Isamaru and Yoshimaru.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL