(Seriously, the card isn't legendary itself, and the Demons aren't legendary either.) You can use high quality Demons like Shadowborn Demon, which has a cool trigger, or other classics like Rune-Scarred Demon
Here's everything you need to know about MTG Cascade: How does MTG Cascade work
Unlike standard cards found in randomized booster packs, these items are released through specific channels, making them distinct milestones for players and collectors alike
Ditto ( Genetic Apex ) is normally a situational and underwhelming Pokmon that copies an opponent's attack if you attached the appropriate Energy to it, but saw play when Space-Time Smackdown was released as a tool for Rampardos decks in the mirror match
Interestingly, the images above seem to show this version in the regular drop, and the regular version in the Inked drop
Ancient Booster Energy Capsule gives Ancient Pokemon 60 more HP and negates Special Conditions