Do it! Kill him and do it now.
You were wise to wait until now. I urged you to do it when he was puny and weak, but now that he thinks he’s grown the impact will be catastrophic.
Anyone as bold as him has to die. So make use of this window the enemy has given you. Escalate the confusion, highten the dismay, surround him on every side.
Then plunge a dagger into his heart!!!
Sit back and watch the chaos and misery!