unholy might and pre conversion

Hi there,

ive got a question, although its kind of covered by the wiki, but still want a confirmation:

penance brand - physical spell -
passive: 25% of phys -> lightning
gem phys to ligthning - 50% converted
leaves 25% phys damage that is not converted.

so how does unholy might work now... does it take the original 100% phys for its extra damage, or does it only take the remaining 25% after conversion?
And will it push the obliteration explosions?

It takes the original.
if it was non chaos as extra chaos, it'd take the original and all conversions too