I’ve drawn some SPOOP units for the Deep Woods in Starfall Dungeon. The two common units are a set of psychic mushrooms and apparently a turtle skeleton. The turtle skeleton definitely needs work to be viable as a unit; it’s too complicated and the limbs need to be changed.
In terms of Boss-class units, we’ve got:
Captain Battical!, a superhero-themed bat. A defender of Justice and Innocents, he uses his powers to shield other units from attacks while dealing out attacks of his own. He’s a real radical dude or whatever.
Pumpukeen is a haunted set of clothes and a Jack-o’-Lantern. Lost souls trapped in the Deep Woods ultimately join the collection of souls that compose Pumpukeen. They wander endlessly in the dark, providing a light to lead whoever they find to safer parts of the Forest region. As a unit, Pumpukeen has numerous sword strikes that target multiple enemies, pierce defenses, and inflict burning.