Slow decks want engines and bombs, while aggressive decks want evasion and card advantage
Normally this is a one-time use, once its on the bottom of your deck theres not really many ways to reliably go get the creature again but since River has you draw from the bottom of your deck, youll always have it available
This helps ensure a standard look across multiple languages
It's worth noting that this method of re-releasing cards with in-universe artwork is being used for all Secret Lairs dealing with third-party IPs, such as the upcoming Warhammer 40k Secret Lair
If the copied token is copying something else (for example, if the copied token is one previously created by this ability), then the token enters the battlefield as whatever that token copied
Evacuation, Black Market Connections, and Wayfarer's Bauble received new art in this deck (Baubles also present in the Blood Rites deck)