This deck is built around the new Druid sidequest Lost in the Park. As you progress the quest you'll receive armour as a reward, making using your face to control the board more comfortable. This will help you keep the pressure on your opponent until you can introduce them to big, bad Guff the Tough!
You'll have on-curve plays like the new Wickerclaw and Park Panther, two beasts that can snowball the game to victory. Some of the usual, neutral suspects are here too, and spell generation helps progress the quest and keep your hand full for a Glowfly Swarm.

You'll want to look for strong early plays like Wickerclaw, Wandmaker, and Mankrik during the mulligan and stay on curve. This will help you contest the board and chip away at the enemy's health while you complete the quest.
Against controlling opponents, remember that Mark of the Spikeshell can generate serious value by copying Guff the Tough and Greybough!
Against aggressive opponents, you'll already be contesting the board, and the rewards from Lost in the Park will be a big help! Holding on to new card Best in Shell is a turtle-y good idea as well.