Kieran, Oscars Rival

Haste

Boast {1}: You may change Kieran, Oscars Rivals base power to 1 plus the greatest power among creatures you control until end of turn. (Activate this ability only if this creature attacked this turn and only once each turn.)

You’re my archrival! That’s an honor! I know your true skills better than anyone. If you say you will come back, I’ll
do everything I can to recommend your honorable return to the knights!