Arley, Yato's Clan Chief

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)
Whenever a creature dealt damage this turn by
Arley, Yato's Clan Chief dies, choose one —
• Put a +1/+1 counter on target creature you
control.
• Arley, Yato's Clan Chief Bushido 1 becomes
Bushido X until your next turn's endstep, where
X is that creature's power.