If the equipped creature somehow deals combat damage to a player on an opponent's turn, the second ability will trigger
Modal Dual Faced Cards (MDFCs) Modal double-faced cards are tricky to balance, especially with the inclusion of so many mono-colored MDFC lands from Modern Horizons 3 that allow you to pay life to have them enter untapped, along with hybrid cards that are a tapped dual land on the backside
The History of Siege Cards in MTG Siege cards, the first subtype of the battle card type, were introduced in March of the Machine
So, with a 1-9 youre getting an Instant speed Divination that costs one extra, which isnt great, that would probably be a 1.5 or 2.0, but isnt the worst fail case when the 10-19 gives you a pretty great effect for the cost -- like Behold the Multiverse without Foretell, and thats a good place to be
Look what you can do now with that Blinding Mage of yours