I love how they are using this adventure to beef up the last 3 expansions but I think this is pretty damn lackluster. You want to complete your quest asap so this is like a Bad Luck Albatross draw later in the game. Even when you play it it's a small payoff unless you have synergies. Does help the hopeless mage quest as well as the other not hopeless one...
I tryed a Malygos deck with the quest without any card to complete, only to get the draws and coins, with the new card and 3 manas draw 3 cards is very easy to draw all your deck very quickly then play Alex in turn 9 (or 7 if played the 4 manas 5/4 legendary) and the finishing move with Malygos + burn spells with prep and coins.
This card is far more powerful than it may appear. Coins are spells and 1 extra mana. Certain combos require 11 mana and special setups or mana discounts to work. This bypasses that requirement.
As someone mentioned, you can get double Shudderwock without going second and getting the coin. This is quite good for that and also enables combos that were nerfed because of mana cost increases or other nerfs.
Enable Quest mage for those that like to play that one. Makes Quest Druid not get too far behind with minions and helps complete quest while 'playing on curve'. Rogue Quest gets more free mana and spells for all those combo cards and OTK potential.
Basically, gives some tempo back to those Quest decks so that the playing it on turn 1 gives something back to you later.
Well, I tried using this in a Quest Druid and it was SEVERELY lackluster. It is great if you have it in your mulligan and/or if you draw into it in your 1st few turn, but it is such a painful mid to late game draw that I removed it immediately. As somebody has already said, Questing Adventurer would be a better card and that never saw play in Quest Druid for a reason. You are trying to get your quest complete as fast as possible and this doesn't really help in that sense. And Druid has Innervate already, so if you need mana cheat, just use that. This was disappointing at best.