Unbiased Ir'revrykal+5 mod

BG2:EE added Ir'revrykal, a +5 TWS only usable by evil Paladins (Blackguards), but as it is based in the good ol' Unholy Reaver (thanks to Tresset for finding that it was actually based in that sword, codenamed reaver.itm), it's much underpowered than Carsomyr (which can also be upgraded to +6), so I made a few tweaks to it so it gets a little more powerful and description accurate :) abilities toward good creatures.
In the future I might add some other things to the weapon. Any type of feedback it's welcome.