Decripify again

[centur]

patch.txt
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- Patch 1.09 (Lord of Destruction and Standard)
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Skill Balance Changes

- Decrepify no longer reduces the damage Resistance of immune monsters.

according patch.txt there is no chance to kill phys immunies with decripify, lowering their immunity to resistance. But today with The Reaper's Toll (Elite poleaxe with 33% chance to cast decripify on striking) my friend easy killed all phys immunies in Arcane sanctuary Hell diff. And more, we walked his poison necro to act 5 worldstone keep (as i understand there will be most ressistant monsters and most harder to lower their immunity) and decripify level1 (prereq for his Lower resistances) removes any phys immunities.
All this was done on lan - no b.net to test with.
Is this old bug or new feature back ( in this case polearms users with Reaper's toll and 2hAxe uesers with Executioners justice virtually can solo any monsters in game

[adeyke]

It's a new feature. Lower resist, decrepify, amplify damage and conviction can all pierce immunities, though they do so at 1/5 of their power (e.g. -50% on a 90% monster will yield 40%, -50% on a 100% monster will yield 90%).

[dizzle]

And particularly so for PI's, because none have a base resist over 100%, so the only ones that cannot be killed that way are those with high base resist coupled with Stone Skin.