First introduced in Wilds of Eldraine, the Adventure mechanic allows players to cast the Adventure half of a card, then later cast the other half from exile once the Adventure resolves
This can target any targetable creature, also, unlike spells like Go For The Throat which I see played a lot in EDH
A trainer's statistics can be found on the back of their League Card
Garland, Knight of Cornelia is an okay-sized creature that gives you some value while you cast noncreature spells
However, this Secret Lair version is one of the most expensive, due to it having a Raised foil version for $99.99, alongside Non-foil at $29.99 and Rainbow foil at $39.99
Queen Marchesa Monarch is a fun mechanic for Commander for the simple fact that it speeds up the game and players cant wait out their strategies as easily