Psion (Triclops Substitution Level)
From D&D Wiki
Triclopean Psion 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.
3rd, 6th, 9th, 12th, 15th & 18th level: At 3rd level, a Triclopean Psion gains an additional 0th level and an additional 1st level power. This is followed by an additional 2nd level power at 6th level, an additional 3rd level power at 9th level... and so on.