Used Carouse on Poxtoberfest Maiden to give my Treasure Hunter a Desert Brew and he was unable to activate Shatter Summons. You could click the ability but no AP was deducted and the ability did not trigger.
Tried it and for me it worked, but didnt have that cool poxtoberfest maiden just our average beermaiden, but the shatter summon AoE marker was still active after ive used it so i clicked somewhere again and then the client froze, like other abilities tend to do if you activate them twice. Tested it both with shatter+new brew and on a fresh deployed treasure hunter tested in Custom Games - BOT