Blank Target

From FFXIclopedia, the free Final Fantasy XI encyclopedia

A blank target is a targetable location in the game which has no description in the Target window whatsoever when you target it. Most commonly these are for the cutscenes that complete the various Relic Weapons but there are several others as well, notably a door in Sea Serpent Grotto you must open to reach Norg.

There is a blank target in Batallia Downs. It is around (F-6), and is visible by a strange white aura at the bottom of a cliff. Also found in North Gustaberg and Garlaige Citadel. These allow for teleporting directly up/down impassable cliffs. See Lycopodium (NPC) for details.