However wrote the expansion rules seems to have got a little confused: They made the same mistake with the wrathguard:
The timing of the Wrathguard special ability should read:
“End of each Damage step” instead of “Start of each
Although the errata above is also wrong, and should say "Start of the damage step", not end.
Unlews someone says otherwise, Illidan's damage occurs in the damage step like every other creature, not the resolution step.
PS. They may have been confused by the fact there is no damage step in PvP combat...