I assume we are looking for a word that has a B as a second letter. I tried:
And that works quiet well for just "I may be even, I may be odd, Or just the one who tells you the way."
As percentage differs from 55-75% and this drink makes you quiet drunk, hallucinating..."
However, (and this is not the answer OP means!) another option is:
I can bury a part in fearsome.
Many people are afraid of you.
Can make the second letter fly, which is awesome.
You are the second letter in the alphabet, a B. And you can fly.
I can behead, but I ain't no killer.
behead; You don't sting people normally, only if you're made angry.
Can finish off anything, but I ain't no murderer.
Not sure - perhaps a honeycomb?
Endless, lifeless, I can be heartless.
be heartless; just looking for nectar from plants.
Changing a trap into a chunk can be seamless.
be seamless; not sure
I can destroy things, just to make something new.
Bees detect and destroy diploid drones after the eggs hatch.
Can help connect things, to help a few.
Worker bees looking for nectar which is used as a source of water.
I may be even, I may be odd, Or just the one who tells you the way.
be even, be odd; not sure
Or I may be just the start or the end, or may be just a say.
be just the start; be just a say; not sure
Two of those non letter thingy arrive, things are blow up.
I play no role when the the things double up.