How It Plays: This deck comes out of the gates fast
(However, if it's still in the graveyard at that time, it will count itself, as it is very much a hot card.) If another effect modifies how much damage your hot source would deal, including preventing some of it, the player being dealt damage or the controller of the permanent being dealt damage chooses an order in which to apply those effects
One major thing to keep in mind is that your seven lands have to have different names, so if you have six Forests and then play Field of the Dead, not much is going to happen
It wouldn't be a surprise to see control decks emerge packing 4 of these, but it's likely at its strongest in midrange strategies where the combat math getting messed up helps too
That said, since it can become a land, effects like Wasteland or other land destruction can still answer it cleanly
There's no way to have it enter the battlefield attached to the Knight token it'll create