This is one of the Support Runes.
It can only be used with level 32 and magic level 9 or higher.
||adevo grav tera
||Any player with Magic Level 9+ and Level 32+
|Buy spell from:
||Shalmar (Darashia), Gundralph (Edron), Tamoril (Yalahar), Tothdral (Ankrahmun)
||Buy made runes from:
(11600 gp per 100)
(232000 gp per backpack)
||Makes an indestructible wall.
||Useful but only lasts 20 seconds. The walls also block runes and bolts from being fired over them. Used heavily in PVP to trap enemies as well as to prevent projectiles from being fired at a given character. In a previous update they were reduced from 4 charges to 3.
See: Complete list of runes.