Anything in a Disney animated short or film is fair game, and it will need to be, as Francke says Ravensburger has 10-plus-year road map for Lorcana. The trick was creating a game in which players could interact with as many cards as they desired if someone wants, for instance, a princess-themed deck, Miller wanted Lorcana to accommodate that while creating a cohesive game that still felt family-friendly and readily approachable
If an effect allows you to cast (rather than "play") a specific modal double-faced card, you can't play it as a land
Teferi is awesome for the first ability
You can even pair it with other Amass cards to make a Sliver-orc-zombie army, if you want to
One should always make sure to obtain a high-quality image before starting on the card creation
Mana from Curious Homunculuss first ability can be spent to cast a spell that has generic mana in its additional cost, such as Borrowed Malevolence with both modes chosen