Considering this all I would not be surprised at all if elves after finding out a Naga lives decides crash moon to the earth.
I would, because thats the single most idiotic thought process you could adopt. Moving the moon even slightly out of orbit will cause disasters of magnitude that would render crashing it into the earth moot.
The Moon’s gravitational pull keeps Earth from wobbling on its axis. Its also provides the climate that supports life.
In the first place it will never make it to the earth. The moon can only get as close as 18,470 km away from the planet, before the Roche limit effect kicks in - the tidal forces would tear it apart
And if the Moon fell into the Earth the collision would break the Earth immediately into large chunks as it joined with and merged with the moon. It wont just kill the dragon/naga - the magma released would cause a firestorm that would engulf the Earth, boil the oceans, change the angle of our axis changing the spin and
extinguish all life.
Its not a big rock that can be dropped on someone's head.
"lets crash the moon into the earth" is childishly witless concept that is pet peeve of mine. Its an outright insult to the audience's intelligence and I would hate for this to be the case here.