- 70 ability power = 1522.5
- The 40% magic penetration from becomes more effective as the target's magic resistance increases. Magic damage dealt is increased by a factor of:
- 30 magic resistance; at
- 100 magic resistance; at
- 200 magic resistance. at
- In order to match flat magic penetration, the enemy must have at least 37.5 magic resistance. Every champion except , and reaches at least 38.5 magic resistance from simply leveling up, making the more efficient item in general. 's or 's
- The item may have been once called Zetta's Manastick, noted from the install directory.
- The AD counterpart to this item is the (and its upgrades).
- Percent magic penetration stacks multiplicatively with other percent magic penetration abilities.