Forged on patch 16.15.1
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: every item passive, rune proc, and resist curve counted, on the current patch.
Free to use. Signing in keeps your builds saved and shareable.
Or start with the data: Champions·Items·Runes
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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.