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==Defenses==

* Regen Rate tells what % of a monster's hit points are recovered per second. Standard is 1.2/sec.
* Blocking values are assigned to every monster in the game, but the ability is seldom enabled, so most monsters can not block (Hence the blocking % given on most ''Diablo II'' monster pages, including Blizzard's, is inaccurate.) When enabled, blocking tells what % of successful, blockable attacks will not damage the monster. Monsters need not carry a shield to block.
* Drain Effectiveness tells what % of a character's mana and life steal apply to that monster. 100 is all, 0 is none.
* Chill Effectiveness tells what % of a character's cold length applies to the monster. 100 is all, 0 is no freeze/chill at all.

{| width="100%"
! Type
! Defense
! Blocking
! Regen Rate
! Drain Effectiveness
! Chill Effectiveness
|-
| '''Undead Flayer'''
| 112 / 955 / 2134
| align="center" | --
| align="center" | 1.2/sec
| 100 / 66 / 33
| 50 / 33 / 0
|-
| '''Undead Soul Killer'''
| 117 / 972 / 2157
| align="center" | --
| align="center" | 1.2/sec
| 100 / 66 / 33
| 50 / 33 / 0
|-
| '''Undead Stygian Doll'''
| 122 / 988 / 2181
| align="center" | --
| align="center" | 1.2/sec
| 100 / 66 / 33
| 50 / 33 / 0
|-
! colspan="6" | Guest Monsters (Act Five, NM/Hell only)
|-
| '''Undead Soul Killer'''
| -- / 1198 / 2228
| align="center" | --
| align="center" | 1.2/sec
| -- / 66 / 33
| -- / 33 / 0
|-
| '''Undead Stygian Doll'''
| -- / 1134 / 2181
| align="center" | --
| align="center" | 1.2/sec
| -- / 66 / 33
| -- / 33 / 0
|}