Aghanim's Scepter

Aghanim’s Scepter is the only item on this shortlist whose effect is different for every hero that buys it, and the buyer data reflects that in an unexpected way: it is overwhelmingly a late-game purchase. Twelve heroes rank it first in their late-game build — Alchemist, Kez, Enigma, Ember Spirit, Bane and Pangolier among them — while only four rank it in the mid game at all, and those four put it fourth or fifth.

For an item that upgrades a hero’s ultimate, that lateness is worth pausing on. The obvious expectation would be the opposite: an ability upgrade should be wanted as early as the hero can afford it, because it compounds for the rest of the game. The data says most heroes are not treating it that way.

Cost is the likely explanation, and the component list makes the case. At 4,200 gold assembled from Point Booster, Staff of Wizardry, Ogre Axe and Blade of Alacrity, Aghanim’s Scepter has the longest build path of the ten items profiled here. Each of those four parts is a plain stat item, so a hero halfway to a Scepter has bought some health and mana and nothing that changes what it can do. The reward is entirely at the end, and the path there is long.

The four mid-game buyers are the exception that supports this. Io, Brewmaster, Underlord and Pudge rank it fifth or fourth mid — present, but behind other things — which looks like heroes for whom the upgrade is unusually transformative choosing to accept the awkward build path anyway.

It also builds further, into Aghanim’s Blessing, which means the late-game picture here understates how many heroes end a game with the effect. A hero that consumes or upgrades the Scepter stops reporting it, and this dataset only sees the item, not the ability it granted.

As ever, these are build priorities rather than outcomes. Nothing on this page measures whether the upgrade was worth 4,200 gold for any of the heroes listed.