Heal-Druid from Rise of Shadows needed a win condition, at least if you didn't have Lucentbark or weren't willing to play the slowest Fatigue games in the meta. Saviors of Uldum gives them a nasty little Two-Turn Kill combo for not too many cards invested: Linecracker + BEEEES!!!

Other card explanations:

• Ironhide Direhorn is there as a secondary win condition (with BEEEES!!!) if you don't draw Linecracker
• Wrath and Swipe as standard removal cards, so that you're not too tempted to use BEEEES!!! just as removal
• Crystal Power, Traveling Healer, Zilliax, and Khartut Defender are your healing package. Hopefully they're enough. They all heal enough to trigger Soup Vendor, and I left out cards that seem tempting in heal-Druid but in practice felt underwhelming, like Healing Touch and Ancient of Lore
• Lifeweavers and Crystal Stags as your payoffs for healing a bunch: card advantage and board control
• Predatory Instincts to cycle and turn your Crystal Stags and Ironhide Direhorns into true powerhouses
• Soup Vendor for card draw
• Overflow as one last massive heal and massive card draw combined into one
• Crystallizer and Ornery Tortoise to help you take face damage early so you can heal
• Damaged Stegotron might be the odd card here, the most cuttable, but I thought a 5/6 Taunt that you can heal from the get-go seemed good to keep you alive
• Finally, one Shieldbreaker to save for making sure that your buffed-up Linecracker can connect to face

Ticket Scalper was tempting but didn't make the cut; I feel like 6 cards all at once are too much card draw in many cases.