Rage over Sophia

[Pondera]

Each Beast Tribe daily awards you a number of trust points with that Beast Tribe. Once you have enough, a quest opens up that allows you to up your rank with the tribe. Upping your rank will unlock a new set of daily quests. The highest rank set of daily quests are the ones that will award you Materia. Just keep plugging away at those dailies, and be sure to do the rank-up quests when they become available, and you'll get there eventually!

So is it just a one time bonus where I receive materia when I rank up, or is there a vendor materia is made available through once I get to the appropriate level?