How do Surprise Deployment and Flash work with the new tibalt?

they put a creature into play, exactly as they say they do. you get valki.
all the ways to get tibalt rely on an effect that lets you cast the spell without paying its mana cost, whether that's bring to light or cascade. you can't just use flash, or an aether vial on 2, or whatever, because if you are just putting a card onto the battlefield, as opposed to play/casting it it's the front side; same reason you can play the MDFC lands off a crucible or courser but can't put them in off a manabond or sun titan.

Thanks,
Thought I had something for a minute.