Blade didn't need to hear the woodcutters talking to know how many things could go wrong.
Blade didn't need to have the words repeated even once.
Blade did not need to imagine what Elizabeth's body was like any longer.
At least Blade needed no help to learn about the missile base.
That could cause talk, which Blade did not need.
Blade did not need to disturb her and wouldn't have done so even if he had needed to.
Also, consider that Blade will need time to work his magic.
In the garden Blade did not need to look for pools of shadow.
By the time she ran out of breath, Blade didn't need to say anything.
Blade did not need to look to know that such an expression was there.