Thanks for the log. Can you please attach the file: "Routines\MechaMage\Silverfish\UltimateLogs\UILogg_2015-01-30_06-08-46.txt".
In addition, are you using a clean copy of Release, or are you using a version where there might be changes or tweaks to Silverfish?
I just tested mage in practice, and I don't see any new issues with the use of that hero power. My initial thought was a possible API issue from the update, but since it's working for me, it can't be that.
If you're not using a clean, freshly downloaded copy of
Hearthbuddy, can you please do so now and retest to see if you still have that issue? Thanks!