By GamGem ResearchLast updated 18 Oct 2026
Epic · Summoner's Rift
Blighting Jewel — the Magic Penetration Component
1,100gold
Blighting Jewel is the percent Magic Penetration component: 13% of it and 25 Ability Power for 1,100 gold, on top of an Amplifying Tome. Only two items finish from it, Void Staff and Cryptbloom, so it is bought when the enemy stacks Magic Resist. Mid laners buy it most often (51.6%).
What it grants
- 25 Ability Power
- 13% Magic Penetration
Passives
Stats only — this item has no passive. See the shop for items that do.
Blighting Jewel at a glance
Blighting Jewel is an epic item on Summoner's Rift that costs 1,100 gold: Amplifying Tome plus 700 gold. It grants 25 Ability Power and 13% Magic Penetration. It builds into 2 items: Void Staff and Cryptbloom. Priced by its stat block alone, it returns 45.5% of its cost in stats.
Build path
Builds from
Combine cost
700
on top of 1 component, for 1,100 in total.
Builds into
How it performed
- Pick rate
- 1.8%
- Win rate
- 46.2%
- Completion
- Not counted
- Inventory slot
- 4
- Games
- 11,562
- Δ this patch
- Not counted
patch 26.18 · Ranked Solo/Duo · Master+ · EUW · KR · NA · 65,406 matches counted
Who buys it
- Top12.4%
- Jungle17.1%
- Mid51.6%
- Bot16.0%
- Support2.9%
Reach for it when
- Into magic resist
Gold efficiency
45.5%500 gold of stats for 1,100
The stat block only — the passive is not priced.
- 25 Ability Power · 20g each, from Amplifying Tome
- 500g
Not priced, because Riot sells no single-stat item for magic penetration — so this figure covers the rest.
What Blighting Jewel builds into, in full
Cryptbloom 3,000 gold
Recipe: Blighting Jewel, Fiendish Codex and Fiendish Codex plus 200 gold. Grants 75 Ability Power, 30% Magic Penetration and 20 Ability Haste. Passive: Life from Death.
Void Staff 3,000 gold
Recipe: Blighting Jewel and Blasting Wand plus 1,050 gold. Grants 95 Ability Power and 40% Magic Penetration.
Blighting Jewel balance history
Riot's notes from patch 25.S1.1 to 26.20 change nothing about Blighting Jewel.
Other items for the same job
All tagged “Magic Penetration” by Riot.
Quick answers about Blighting Jewel
- How much does Blighting Jewel cost?
- 1,100 gold in total — Amplifying Tome plus 700 gold.
- What is Blighting Jewel built from?
- Amplifying Tome (400), plus 700 gold to combine.
- What does Blighting Jewel build into?
- Void Staff (3,000) and Cryptbloom (3,000).
- What stats does Blighting Jewel give?
- 25 Ability Power and 13% Magic Penetration.
- Where can you buy Blighting Jewel?
- In Summoner's Rift and Howling Abyss (ARAM) — the maps Riot's own data marks it as sold on.
- What does Blighting Jewel sell for?
- 770 gold, against 1,100 to buy.
- Is Blighting Jewel gold efficient?
- Its stats are worth 500 gold at basic-item prices against a cost of 1,100 — 45.5%. The passive is not priced, so this measures the stat block only.