Partly updated for Enshrouded 1.0— 1.0: the unlock cost; the rest is pre-1.0 wiki data

Arcane Concentration
You will gain one spirit for every two levels of the Flame.
Where Arcane Concentration sits on the 1.0 tree
In the Mage area. The cheapest way in from a starting point buys 8 nodes for 12 points, this one included (one rank each).
- 1Spirit1p
- 2Mana Currents1p
- 3Spirit1p
- 4Quick Charge1p
- 5Spirit1p
- 6Intelligence1p
- 7Spellslinger1p
- 8Arcane Concentration5p
Linked toSpellslinger
Related Mage skills
Same archetype — likely candidates to slot next to Arcane Concentration in a build.
Arcane Deflection1pOn a successful parry, gain 20 mana.
Counterstrike1pThis magical attack can trigger other skills.
Eternal Spark1pValues in the 1.0 files: 15% per rank, 3 ranks.
Fire Resistance1pIncreases your Fire Resistance by 5% which reduces the amount of Fire damage received.
Healer1pValues in the 1.0 files: 15% per rank, 3 ranks.
Healing Revive1pValues in the 1.0 files: 8% per rank, 3 ranks.
Ice Resistance1pIncreases your Ice Resistance by 5% which reduces the amount of Ice damage received.
Intelligence1pIncreases your Intelligence attribute by 1 Increases Magic damage by 5% per Attribute Point
Sources: game files 1.0 + Keen Games 1.0 patch notes (changelog, combat changes) for the unlock cost; enshrouded.wiki.gg (pre-1.0) for the description and effects.