Those shadows and the link to ink seemed to indicate it was Ursula that jumped out of the book and caused the flood
The front side is a Legendary Creature, meaning similar to our #6 entry, you can play Valki as your commander, but then cast Tibalt from the Command Zone
Rebuke has always been borderline playable in Modern, but in this deck, it was incredibly easy to pay just one mana for it while still developing the board
In many cases, cards that play supporting roles in your deck can also double as ways to advance your strategy (Faithless Looting lets you both draw new cards and fill your graveyard with cards you can Reanimate, use to give you a benefit like Anger, or simply make it easier to cast cards like Bedlam Reveler
When in doubt, apply multiple tests, and use your judgment