Impossible Task: The Warden's Head

People keep requesting that the Warden should drop something upon killing it, but the Warden is not meant to be fought but to be avoided entirely. Regardless of the intention, there are still so many people that want to provoke it and be acknowledged for their courage. I was thinking that the Warden has a cool looking head so I think we should be able to obtain it, NOT from killing it directly, but as drop from a charged creeper's explosion like most of the other mobs minus the Wither Skeleton and Ender Dragon. This is so the Warden still doesn't have a great reward for killing it directly if they manage to, but if the player manages to complete this nearly impossible task of bringing two mobs of completely different worlds together, then the head of the blind monster will be their trophy to show off to their friends.