From the Experimentation Power Source, there is a Yellow Zone Reaction Ability called Misdirection.
Misdirection(R): When a nearby hero in the Yellow or Red zone would take damage, Defend against that damage by rolling your single [power] die, then redirect any remaining damage to a nearby minion of your choice.
If one is to activate Misdirection, does there need to be a minion to redirect the potential remaining damage into?