It may sound bizarre, but many Pokmon cards are worth more due to having a unique printing error
The two heroes, Minsc and Boo, are a pair of allies who are always looking to do good and save the day from evil despite their powerless abilities, but that did not stop this card from being a strong Legendary Planeswalker that put terror into the hearts of any decks that go against it
But mainly creatures
It looks like something youd expect from ancient Egypt, or similar, if they had access to more modern artistic tools
Editing specific effects like you're talking about with the trainers is on a completely different level from what my program does
Constructs generally want other constructs so here are some solid ways to construct constructs, with both commanders and non-commanders: Urza, Chief Artificer, Mishra, Eminent One, Vihaan, Goldwaker, Dollhouse of Horrors, Digsite Engineer, and Simulacrum Synthesizer