Converted mana cost of spell copies

[mikekelley]

What would the copies of a Tendrils have as a converted mana cost?

Would chalice at 2 stop brain freeze and the subsequent copies? Or do the copies have no mana cost, or does chalice do nothing to the copies, but only counter the brain freeze?

[Locutus]

Mana cost is a copieable value, therefore the converted mana cost of a spell copy is the same as the cc of the original.
Chalice of the Void however triggers only on a spell being played, and storm copies aren't played, they are just put on the stack. So, if you play a copy of Brain Freeze with an Isochron Scepter while a Chalice at 2 is in play, the copy created by the scepter will be countered, while the storm copies won't.

[mikekelley]

Storm is fucking borked.

[freakish777]

Storm interacts the same way with Counterbalance. Counters the spell played, the copies aren't.