I need to pick your brains for experience in dealing with this sort of situation.
So, in our campaign there was recently an occasion where a character interfered with another character’s actions.
The chaotic good Cleric decided to save a lycanthrope, tie him up, cast Zone of Truth and then interrogated it. It promised it would not attack the party ever again. The Cleric released the creature. It dashed away.
As it was dashing off into the distance, the true neutral Warlock decided to Eldritch Blast it into oblivion.
There was no way the Cleric could interfere. The lycanthrope was beyond saving at the point.
The Cleric has already stated that she is very suspicious of the Warlock because of his track record of “finishing off” anyone and everyone. So, she is on alert already as to his way of behaving in these sorts of situations. She feels frustrated because she cannot carry out any benevolent or compassionate actions which is part of her role-playing her character, without the Warlock zapping her efforts.
So my question is:
How can the DM can apply a game mechanic to allow the Cleric to react to what the Warlock is intending to do?
Someone suggested the Cleric should be able to take an action to stop the Warlock – that both players might role initiative. The Cleric said would ready an action and either tie and gag the Warlock or cast Silence or Command.
I’d appreciate any thoughts on how to best manage this.