Forged on patch 16.20.1

League of Building

Know your damage before you lock in

A theorycrafting workshop for League of Legends, at lobb.dev. Pick a champion, forge a build, and run the full combo. It works out your combo damage on the current patch and tells you when an effect isn't modelled yet.

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Or start with the data: Champions·Items·Runes

The League of Building workspace: a level 13 Ahri build with Luden's Echo, Stormsurge and Malignance, running Q, W, E, R and an auto into a burst mage, with the combo damage broken down step by step
The workspace, as it ships: Ahri · level 13 · patch 16.20.1

Real combat math

Read the fight, not a spreadsheet

Queue up Q → auto → ult and see the damage the fight would actually print: mitigation, stacking, and cooldowns included, for every champion.

Honest numbers

Every number shows its work

Tooltips break each stat down to its sources, and when a niche effect isn't modelled yet, they say so plainly. No silent guesses.

Builds that travel

Share it with one link

Every build gets a link and a code. Send a snapshot to your duo, or export the item set straight into the game client.

A workshop that grows with you

Start with one build for tonight's ranked. When one becomes twenty, the library keeps up: folders to organise, sync across your devices, and a grid workspace for comparing builds side by side.