Now provides +40 attack damage and 40% Armor penetration, instead of +40% attack speed, +10 attack damage and 40% Armor penetration.
V1.0.0.103
Unique armor penetration now functions with abilities (but still not against turrets).
V0.9.25.24
Combine cost reduced to 500 g from 750 g.
V0.9.25.21
No longer works on turrets.
May 9, 2009 Patch
Fixed a bug which gave it an ability power ratio of 1.
Fixed a bug which caused it to do bonus damage based on ability power.
May 23, 2009 Patch
Last Whisper now penetrates 33% of the defender's armor (Unique).
Combine cost reduced to 750 g from 850 g.
May 1, 2009 Patch
Functionality changed to a "35% chance on hit to deal 1 Magic Damage for each point of Armor the target has" from a 50% chance to ignore all of the target's armor.