Much like Scar, Mastermind - an underrated Amethyst card from The First Chapter, Maid Marian has an on-play effect that can take your opponent by surprise, giving you a chance to trade with their board for free, and establish a well-statted character that can start questing the very next turn
If your opponent is in red, the burn spells generally do 3 or 4 damage such as Fire Prophecy and Flame Spill, so if you want to avoid that, you'd want to put a 5 toughness creature on top
If you never plan on attacking with the birds, keep in mind that Luxray GL LV
Starting with a mechanic idea, it felt straightforward to create some cards with the mechanic and/or that supported the mechanic, then add some generic cards like removal spells and simple creatures
I also really like this leading a Pinger deck where you tap a Prodigal Pyromancer to shoot your team for a damage, and make sure you are running things that will take the damage into good stuff like Stuffy Doll, Brash Taunter, and the enraging Dinosaurs Bellowing Aegisaur and Sun-Crowned Hunters