
Fiendish CodexOverview
- Cost
- 850g
- Builds from
- Amplifying Tome + Glowing Mote + 200g
- Win rate (Patch 26.17)
- 47.2%
- Pick Rate
- 1.2%
- Gold efficiency
- 64%
Fiendish Codex is built from Amplifying Tome + Glowing Mote plus a 200 gold recipe, for a total of 850 gold. Each component can be bought on its own, so the build can be split across several back-to-base trips.
Fiendish Codex Early vs Late Game Performance's win rate varies throughout the game based on match duration. Fiendish Codex Early vs Late Game Performance peaks at 50.64% win rate in 45 minute games, while performing lowest at 42.42% in 50+ minute games. Understanding Fiendish Codex Early vs Late Game Performance's power spikes across game duration helps optimize your playstyle and decision-making.
Gold efficiency measures how much gold value Fiendish Codex provides through its raw stats compared to its purchase cost. An item with 100% gold efficiency provides stats worth exactly its gold cost. Fiendish Codex has 64% gold efficiency, providing 544 gold worth of stats for its 850 gold cost.
Fiendish Codex is holding steady: 47.16% in Patch 26.17 against 47.41% in Patch 26.16, a 0.25-point change. This is observed performance across ranked games, not a changelog entry — MetaBot does not track Riot’s item notes.
Theorycraft Your Next Build
Test any item combination — even off-meta — against thousands of real matches. See win rate, KDA, damage, and every item's real impact before you ever lock in.
- Any item combo — even off-meta
- Thousands of real matches
- Win rate by rank & game length

When to Buy Fiendish Codex
Strengths
- Situationally powerful when built on the right champions
- Unique passive/active effects that enhance specific playstyles
- Flexible build path that fits multiple item combinations
- Consistent performance throughout all game phases
Weaknesses
- Below average win rate suggests situational use is best
- 64% gold efficiency - relies on passive/active for value
- Weaker early game before completing the item
- Niche pick that doesn't fit all team compositions
Strategic Tips
Champion Selection
Check the builds tab to see which champions have the highest win rates with Fiendish Codex.
Build Synergies
Build Fiendish Codex as part of a cohesive item path that matches your champion's damage profile.
Timing Your Purchase
Consider your team's win condition and item spike timings when deciding to build Fiendish Codex.
Get the Winning Edge
Real-time overlays, automatic match tracking, and exclusive tools — everything you need to climb, free on your PC.
- In-game overlays
- Automatic match tracking
- Desktop-exclusive tools
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Fiendish Codex - Frequently Asked Questions
What is Fiendish Codex in League of Legends?
Fiendish Codex is an item in League of Legends that costs 850 gold. It has a 47.16% win rate and 1.25% pick rate across all champions. Fiendish Codex provides Ability Power.
What is Fiendish Codex's win rate in League of Legends?
Fiendish Codex has a 47.16% win rate in League of Legends with a 1.25% pick rate.
Did Fiendish Codex change in Patch 26.17?
In Patch 26.17, Fiendish Codex has a 47.16% win rate against 47.41% in Patch 26.16, a 0.25-point change. MetaBot tracks observed performance in ranked games rather than Riot’s item changelog, so check the official patch notes for the exact change.
Which champions build Fiendish Codex?
Fiendish Codex is built by various champions in League of Legends.
What items synergize best with Fiendish Codex?
Check the synergy items section above to see which items pair well with Fiendish Codex.
Is Fiendish Codex gold efficient?
Fiendish Codex costs 850 gold and is 64% gold efficient, providing 544 gold worth of stats. While Fiendish Codex is below 100% gold efficiency for raw stats, its unique passive effects provide additional value.
Which champion has the highest win rate with Fiendish Codex?
Check the builds table above to see which champions perform best with Fiendish Codex.
How do I build Fiendish Codex?
To build Fiendish Codex, you need Amplifying Tome + Glowing Mote for a total cost of 850 gold.
What items share a component with Fiendish Codex?
Items that share components with Fiendish Codex include Lost Chapter (shares Amplifying Tome, Glowing Mote), Bandleglass Mirror (shares Amplifying Tome, Glowing Mote), The Brutalizer (shares Glowing Mote), Seeker's Armguard (shares Amplifying Tome), Shattered Armguard (shares Amplifying Tome), and 1 more. These items may fit similar build paths or offer alternative options when building from the same components.
Get MetaBot on your gaming PC
The desktop app is Windows-only — send yourself the link and install it next time you sit down to play.
- Live in-game overlays while you play
- Every match tracked automatically
- Post-game AI coaching and breakdowns