Haphazard Bombardment is worded slightly, so I assume intentionally, different from cards I can find that seem similar. Particularly in that it doesn't target the chosen cards.
Granted this is unusual, but suppose my opponent on the draw missed 3 land drops and has only 3 land on the battlefield on my turn 6. Can I cast Haphazard Bombardment given there are only 3 things (specifically not targets) I can possibly choose? Or does it count as part of the cost that 4 nonenchantment permanents be chosen? My understanding is, if it said "choose 4 target nonenchantment permanents" and there were only 3 options, it would be uncastable. Is the same true without the "target"?
If there are 4 or more options, I'm fairly confident I can't choose fewer but I'm unclear if I can get away with it when there aren't enough choices.