Shop the Lorcana collection on Rare Candy
The First Chapter introduced just about everything we know and love from Lorcana today
In a format like Legacy with Lotus Petal, Lions Eye Diamond, and a variety of Rituals, it doesnt take much before Vivi is huge
You can't put a Teferi's Moat out there for a long, long time against decks unknown with the knowledge that an enchantment removal or bounce spell will almost certainly kill you unless you are very brave, and once you start down the Moat road it's hard to stop
Then the Vampire was printed next, same cost, this time it adds flying and +1 toughness, but it just works once per turn so it's both better then Mentor (flying, bigger size, no mana needed) and worse (just once per turn)
You choose both modes as you cast Cryptic Command