45+ Eridian. However, you won't be able to read it. That's the main draw for completing all of the eridian writing, because you can spend eridium on various cosmetics at crazy earl's shop on sanctuary.
On this planet you will find a number of eridian writings to uncover. To actually decode the eridian slabs however, you need to get the eridian. You get the eridian analyzer from the great vault.
You'll receive 25 eridian for every piece of eridian writing you read.
Debut ep 'hollow theory' available now. Borderlands 3 (bl3) has 30 eridian writing slab locations. Meridian (astronomy), imaginary circle in a plane perpendicular to the planes of the celestial equator and horizon. You get the eridian analyzer from the great vault.