Psychic Warrior (Triclops Substitution Level)
From D&D Wiki
 Triclopean Psychic Warrior Substitution Levels
Note: Only pureblood Triclopes are eligible for these, not Half-Triclopes. Triclopes are naturally psionic, and their mental control allows them to develop additional powers.
4th, 8th, 12th, 16th & 20th level: At 4th level, a Triclopean Psychic Warrior gains an additional 0th level and an additional 1st level power. This is followed by an additional 2nd level power at 8th level, an additional 3rd level power at 12th level... and so on.