Seems like old Eudora to me, only that you pay 4 gold in one turn instead of across 4 turns, to find a golden minion.
Maybe still a bit weaker, since you won't get a random golden minion in addition to what you already have, and you actually have to collect doubles for this to do anything. Then again, on higher tiers its a lot scarier. Buying a second Brann or Baron was only worth it if you could afford to potentially waste gold, and Zephrys makes these safe investments.
So, a bit less reliable than Eudora early on, but potentially a lot stronger later... sounds good enough to me.
Play as Zephry's, finished second to a Nostrilsdormu with triple Kalegos. My 2nd place board was B.S. unfair and it was REALLY EASY, only that Nostrilsdormu with a triple Kalegos was going to beat me.
Hero power is OP. I would pay 6 mana for that hero power, since Bob has me on the "don't give this player triples lists".
I think hero power is OP only because Battlegrounds has so many shit tavern rolls. In the land of shit Tavern Rolls, the guy who turned a turd into gold is King!
Seriously, are we noticing a problem here? The best heroes say fruck you to Bob's Tavern. Jandice says "F you bob, I'll just replay a minion ... you can keep your turds". Zephyr's says "Haha, Bob! Jokes on you!"