They're also super strong - Minnie can banish an exerted character every time she quests and Mickey is really flexible - he can be small or big depending on how you play him
Courageous Goblin isn't as exciting
Any time you attack with any creature, you can take an attacking Vampire you control and make it a Demon as well as being a Vampire
He also makes it so that if you control three or more wolves or werewolves at the beginning of your upkeep, it becomes night and you can transform any number of human werewolves you control
For a converted mana cost of three for a 2/3, it could be the trump card you need in a bind, and at $3 at the minute, its a bit of a steal
And if we do this, I could tweak a few existing cards to call out some of these types, so it will occasionally matter as a bit of texture