Sir Pavyel the Lawful

Whenever a creature deals damage to you, you may pay an amount of {w} equal to half the amount of damage dealt this way rounded up, if you do, destroy that creature.
Whenever a player casts a spell that targets you or a permanent you control, you may pay an amount of {u} equal to that spell's converted
mana cost, if you do, counter that spell.
"You have no rights, criminal"