If you never plan on attacking with the birds, keep in mind that Luxray GL LV
Additionally, the final mode of dealing damage sounds nice, but only hitting Creatures makes it a tough sell
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
Shoot the Sheriff Shoot the Sheriff is very similar to other 2-mana restrictive black removal spells
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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