In addition to the transforming double faced cards, there are also modal double faced cards
These tokens can then be used to win in one of several ways: First, the deck features several cards that will do direct damage to your opponents when you sacrifice permanents (Marionette Master, Disciple of the Vault, Mayhem , Reckless Firewheeler, etc)
However, you also gain value from this flip-walkers -1 ability, which can potentially take out opponents based on the amount of life youve gained in a turn
You can also cast it as a surprise blocker with reach, which might not be irrelevant
The low casting cost and seductive wording of that ability has tempted many players to try this out, only to realize the brutal mathematics involved
What I really like about this set is how it takes existing archetypes and makes them weird