Dungeon Run treasure for mage.

Rodney is the little dragon buddy of the explorers in Uldum and if there's two things he loves its treasure and mischief! At the start of every boss in your run with Rodney (after mulligan but before your current passives activate), a Discover interface will appear with three passive treasures you don't currently have. The ones you choose will now activate instead of your current ones you have picked between matches. This should allow you to tailor your passives to each boss along the way, adapting your strategy slightly in order to counter certain bosses more successfully (or cause more mayhem!). Another point is that if you only have one passive treasure when you take Rodney then he will only replace that passive and not give you 2 brand new ones just to make him more balanced mid-run.

Designed for Dungeon Run. I love the idea that if you have nothing left and choose to throw away (cast) your lantern, The Darkness will arrive. The text in italics hints that you won't need to shuffle any candles in order to awaken it. Furthermore, the idea that your last lantern is in itself a treasure amuses me somehow :P

The empty hand mechanic mitigates the fact that if this card is in your opening hand against many bosses, especially early ones, it would be an instant win and make gameplay less engaging. That said, I do not think this treasure is ridiculously powerful, but is thematically very fun. I'd love to see what voice lines the HS team would come up with playing this against The Darkness boss.

Rise of Shadow card. Here are some important notes of this card:

1. In case there is a third power-linker between other two of them, yes, it will work.

2. If there are four or more power-linkers altogether, the interaction will work differently. I recommended adventurers (and you) to put a non "power-linker" minion between them, so each power-linker's function will fully worked out right.

A warlock "Teammate" treasure for the Rumble Run.

The blood magic of Hir'eek's Bats can form strange creatures that drain the life force from all around them to grow in power. 

Treasure spell for the Time-Tinker in Monster Hunt.

Token: Felhound Portal

Treasure for Dalaran Heist. 

For Aggro runs.

A Monster Hunt treasure for Houndmaster Shawn. A flexile card that provides tempo and value for any build you're trying to make.

Totem of the Damned kinda sucked in dalaran heist, I figured something like this would make it better/funner.

Voice line when drawn: "Have some nice refreshments. Always good to pace yourself, you know!" 

Not all heroes wear capes. Some wear keffiyehs and hand out drinks.

In a minion oriented deck this treasure from the Dalaran Heist might make the difference between hijacking a whole floating city and involuntarily finding out how high exactly that thing flies above the ground. Rafaam's fantastic concoction gets introduced as his secret weapon to counter Dalaran's magical defenses.

Shirvallah’s Sanctuary is a Shrine which provides the young Troll Rikkar with protection while active, though Shirvallah still has a trick or three up their feline-sleeves.

A treasure to fill your hand with more treasures! Let the RNG fun ensue! 

You don't know if the Treasure is an occult spellbook or a mimic in disguise: you'll just have to open it and find out! For Dalaran Heist.

I set it for the Kolbolds expansion back when dungeons could actually be a pain. Decided to use an artifact weapon from WoW with treant synergy since very little existed at the time for those dungeon runs.

When you play Pact of the Fel, your hero will become Lord Jaraxxus from regular hearthstone. Your portrait will change, your health will be set to 15, you will get the 3/8 Blood Fury weapon, and your hero power will summon a 6/6 Infernal. This effect will persist for the rest of the run, each game you will start off as Jaraxxus. You will no longer gain max health each encounter, though you can still gain maximum health from other sources (Potion of Vitality for example).

I THINK I WILL TAKE IT!

This is pretty much the same as Atiesh that the player receives from Medivh, the Guardian except that is doesn't lose durability. It can be destroyed by Acidic Swamp Ooze and the like.

More of a constant value enhancement for your Shrines. Generates additional minions after one of your Shrines revive, giving you more stuff to work around. And yes, if at least two Shrines revive at the same time, they will each trigger Elemental Echo, filling your board with Elementals.

"He's done axing questions!"

A very strong weapon that can only be used as removal. The idea is that this sword stays alive for the majority of the game, helping you to stay ahead of your opponent.

I thought Tombs of Terror need a way to unite the league against their foes. Summons Dinotamer Brann, Elise the Enlightened, Reno the Relicologist, and Sir Finley of the Sands. All of the minions trigger their battlecries regardless of whether or not you have duplicates in your deck.

A very fun card that makes deck-building much more interesting.

So this is a card that has its full potential at the 7th boss. You summon 6 copies of it.

There isn‘t much more too say. It‘s of course a TEMPLE golem, that protects the Tomb from any danger and it will work with you to defeat the plagues!

Pretty much like a reverse Pearl of the Tides with a single target (devolving the whole board felt too powerful). The effect takes place at the end of your turn as you may want to trade away the 6-mana 1/1s and similar before it. The devolving effect is purely random, but adding the "randoms" in text would've made it too wordy for my taste.

Totally stole the art from Surprise! Murlocs! as I couldn't find anything as flavorful as that. I thought the flavor would fit best for Rise of Shadows and Dalaran Heist as the evil takes over and Hagatha curses everyone (although we did not know that League of Explorers would be the heroes to fight the League of E.V.I.L. back then but just ignore that part).

Hopefully I didn't accidentally steal someone else's idea.