Murata, Demon Slayer

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)

{1}{w},{t}: Put a training counter on target creature. That creature gains bushido 1 and becomes a Samurai in addition to its other creature types. Activate only as a sorcery.

"Even if it's a small, insignificant thing, I will never give up. That's what it means to be a Hashira."