Support for one of the more flavorful mechanics of the Paladin class, and Lightfang Enforcer for Divine Shield strategies in Battlegrounds. The tripled Battlegrounds version, which I would've included if Hearthcards didn't annoy me with the text alignment, would naturally be double the stats and and the effect.

My idea brings together Freeze Shaman, an archetype that never got off the ground, with Freezing in Battlegrounds, an aspect of the game that hasn't really been explored fully.

In constructed, this would be a Freeze Mage and Freeze Shaman support card (because it would be part of the KotFT expansion). As a 1/5 it should have some chance of seeing play. In Battlegrounds it is similar to Gentle Djinni, but instead of always giving you a valuable card, it will likely give you something random. Additionally, because it forces you to Freeze it essentially "costs" 1 Gold (because you miss out on a reroll), making it similar to Rafaam's Hero Power. It also forces you to keep a 1/5 on your board, which is far worse than Gentle Djinni at Tier 5. Between the unreliability, the 1 Gold "cost," and the cost in making your boardstate worse, I think that this would be balanced. 

Reckless Gambler is a powerful combo-enabler in standard. While the effect might look scary at first glance, please note that it is capped by hand size limit - you basically can't get more than 5 Coins without playing Valdris Felgorge first. It goes without saying that this guy would be best friends with Edwin VanCleef anyway. 

I'm not much of a Battlegrounds player, but I figure getting Coins is a good thing in this mode. You usually don't tend to keep lots of cards in hand though, so I hope this is somewhat balanced.

(0) mana in normal games, (0) gold in Battlegrounds. 

I could only submit four pictures, but the battleground tokens are as you'd expect. A 1 star 3/3 with Divine Shield and a 1 star 6/6 with Divine Shield if Golden. I wanted to create a card that works with some lesser used Battleground strats, a Divine Shield build or a Khadgar build. It's not an incredibly strong card in Battleground but I think it could be fun, and you could get multiple triggers if you have Selfless Hero. In constructed it is a lot of stats for 6 mana, however they are spaced out and more or less your opponent can control when you get them. You can combine it with other Divine Shield synergy cards to get a lot of powerful tokens.

Golden version of battlegrounds card gives you 4 coins.

Golden copy of this in Battlegrounds would say "Battlecry: Give an Elemental +2/+4 and "Deathrattle: Add a 2/4 Elemental to your hand."

"Hello! Hello! Hello! Hello!"

A much needed boost for Pirates. Divine Shield synergizes well with on-attack effects many Pirates have.

Kin'garoth is the mastermind behind every demonic war machine of the Burning Legion, having integrated his own body with their infernal devices in the headquarters of Antorus, the Burning Throne. This synergy of two tribes-- demon and mech-- makes him perfectly suited for battlegrounds, as does his method of summoning the mechs. 

In constructed, a cool little card for big demons, some slower midrange, or even token decks. In Battlegrounds, it's something to support Soul Juggler builds. Similar to BEEEES!!!, the imps will be summoned even if Satyr Gang Leader kills its target. Of course, the imps are textless 2/2 demons.

"From my observations, this murloc grew 5 more arms, 8 new pair of eyes, became around 5 to 6 times bigger, and began sprouting wings. I think I should consider changing my career path." - A scientist of murloc studies.

In Battlegrounds this minion can Discover [Hearthstone Card (Demon) Not Found] from the current tavern tier or lower.

"Twice the power, double the face."  In constructed, the Shadowmoon Adept is a decent 1-drop that can let you double up on the Demon Hunter's 1-mana Hero Power. Not too shabby, but never judge a Babbling Book by its cover. With the right hero leading her on the Battlegrounds, she can truly be a force to be reckoned with by doubling much more powerful effects.

The idea behind the flavor is a port official or admiral that secretly supports piracy to disrupt his rivals' trade. Just like the French, Englishmen etc did in the Carribeans a few centuries back. Tavern Tier migh be changed in an upcoming patch. Rogues love their coins in regular play, everybody loves them in the Battlegrounds. "This turn only" makes the card balanced.

Artist: Bob Kehl.

Naturewalker is a very versatile card for both Constructed and for Battlegrounds. It's a good fit in any type of tribal deck in Constructed, providing a +1/+1 buff to all your minions of a tribe you choose regardless of where they are. In Battlegrounds, its ability to fit into any tribe-based gameplan means that it's never a bad time to roll one of these in Bob's Tavern, and gives you a +1/+1 buff for everything on your tribe for the whole game.

The Battlecry can be used to buff a minion without a type, although this will not buff your other minions without a type. Choosing a minion with All tribes will buff whichever tribe is most prominent in your hand, deck, and battlefield at that time.