You gain the service of a loyal dragon ally.
Prerequisites: Character level 9th, Speak Language (Draconic).
Benefit: You gain a cohort selected from Table 3–14: Dragon Cohorts (Dr 139), just as you would by selecting the Leadership feat. However, you may treat the dragon’s ECL as if it were 3 lower than indicated.
See Dragons as Cohorts (Dr 138), for more information.
Source: Draconomicon, page 104.