Hi! Thank you for your response! For some more information, this issue seems to affect PvE and PvP separately. In PvP, explosion kills from the Explosive Knive with Caliban's Hand will trigger the refresh the Explosive Knife cooldown when you have Knock 'Em Down equipped and are Radiant. But in PvE, this refresh, in most cases, only seems to be triggered by the knife impact itself killing targets. It will not refresh if the explosion kills the target. You can see examples as pointed out in the following video at the given timestamp: https://www.youtube.com/watch?v=uXNyVhFM3G0&t=572s Additionally, while the Caliban's Hand exotic is equipped, neither Melee Wellmaker nor Explosive Wellmaker seem to consistently generate wells. As soon as you unequip the exotic, kills from Explosive Knife will generate wells frequently.