Counterattack Serum I is an active skill in AION Classic 5.0. The Gladiator learns it from level 58. It recharges in 30 s.
Learned by
| Class | Faction | Character level | Skill level |
|---|---|---|---|
| Gladiator | Both factions | 58–66 | 1–9 |
| Gladiator | Both factions | 71–75 | 10–14 |
Taught by
| Item | Skill level |
|---|---|
 Counterattack Serum I |