The card is cast from exile, and so try and avoid taking Vampires with it that you would've otherwise played from your hand with Strefan, but anything like a removal spell or enchantment is an excellent pick.
The second chapter is a mass-bounce effect for all non-Phyrexian creatures, and the third chapter lets you cheat-cast your spells for free
To accomplish this, you can use opaque sleeves (and you probably already are), and you can also use these helper cards
Flowering of the White Tree One for all First up we have a tree, which has taken us by surprise, but hey, thats just fantasy
New and Existing Cards can be Combined to Build Powerful Decks
Jank theme deck around the process of law