Cryo Bot says that whenever he takes damage, he deals each non-hero Target 1 damage.
We know that returning damage effects (like Flame Barrier) can interrupt the effect of deal all ___ damage and potentially end the chain if it is destroyed.
So if you Wrest the Mind on Cryo Bot, and he gets hit for 1 damage, he would deal all non-hero targets 1 damage.
Use wrest the mind to redirect the last instance of damage to Cryo Bot. See where I am going with this?
You just have to change the damage type to non-cold and make sure it deals at leasst one damage to Cryo.
Cryo triggers and interrupts the follow-thru on Wrest the Mind to deal all non-hero targets one damage.
Just repeat until he is at one health, then let him deal damage to all the targets, wrest the mind will then kill him and deal no damage to Visionary.
If you have a +1 damage on Cryo (other than TtE) you can deal three damage to all but one Non-hero target, then deal one non-cold damage to Cryo to set him off again.
That's an easy 18 damage to all but one non-hero target.
If you want you can then use Mental Divergence (twice) and Robot Reclamation to set it up again.
If you can raise damage by 2 and get a -1 damage taken on Cryo you can up that to 24 to each target. Worth the effort to set up.
Is there anything wrong with this?
All three cards use the text whenever damage, so I imagine this would work.