The Scenario
Greater Sci-Fi combatant
How much time is "not much"? Because if it's more than a minute True Blood will have already lost. Synthesizing blood takes a lab and more time thanTrue Blood has.
Once in the sun vampires won't defend themselves, and who stop them from killing themselves anyway? You're proposing they all vomit suicide and that's fine by me.
How does this not weaken them? You've got most of your witches caught up in casting a spell to make the vampires kill themselves, while the Fae are busy being drained of blood, and whoever else is trying to synthesize some more. Nearly all your forces are busy do something other than fighting, just to counter one thing Zelda can do. Meanwhile, the rest of Zelda's forces are free to do whatever they want since True Blood is too busy killing itself. With all the vampires in one place, Midna can just drop a Castle buster on that spot and kill them all, or the Light Spirits can just start incinerating. Zant takes the opportunity to start dropping Twilight and turning people into Shadow Beasts. Ganondorf just laughs.