The bgm that formed mountains on my limbs...

[TheVigilant]

https://www.youtube.com/watch?v=FImhMrOpBLo

Why isn't it in the game?
If it was used in 1.0, why not anymore?

[Enkidoh]

Oh yeah that was one of the 1.0 battlecraft leve battle themes (it was the one for La Noscea leves) - in 1.0 each region had different battle music for things like leves and normal battles. In ARR however Soken (who replaced Uematsu as FFXIV's main composer) decided instead to just have a single battlecraft leve theme regardless of region (Tenacity), so the old 1.0 themes fell by the wayside. It's entirely possible they'll return in future Deep Dungeons, as Palace of the Dead featured a number of old 1.0 tracks that had been MIA since 1.0's shutdown (like the original 1.0 Black Shroud theme Emerald Labyrinth).

As to why these tracks haven't yet returned to ARR? I guess Soken felt he just hasn't found a suitable place for them (some other old 1.0 tracks that haven't yet returned are Uematsu's Piece of Mind - the old Path Companion selection track/arrival at a starting city track, not to be confused with Soken's own track of the same name in the HW OST that is a completely different piece of music; and The Seventh Gate - a high tempo boss battle theme that owed a lot to FFVII's boss theme Still More Fighting), so Nail of the Heavens is not the only track from 1.0 still to return.

[TheVigilant]

Oh yeah that was one of the 1.0 battlecraft leve battle themes (it was the one for La Noscea leves) - in 1.0 each region had different battle music for things like leves and normal battles. In ARR however Soken (who replaced Uematsu as FFXIV's main composer) decided instead to just have a single battlecraft leve theme regardless of region (Tenacity), so the old 1.0 themes fell by the wayside. It's entirely possible they'll return in future Deep Dungeons, as Palace of the Dead featured a number of old 1.0 tracks that had been MIA since 1.0's shutdown (like the original 1.0 Black Shroud theme Emerald Labyrinth).

As to why these tracks haven't yet returned to ARR? I guess Soken felt he just hasn't found a suitable place for them (some other old 1.0 tracks that haven't yet returned are Uematsu's Piece of Mind - the old Path Companion selection track/arrival at a starting city track, not to be confused with Soken's own track of the same name in the HW OST that is a completely different piece of music; and The Seventh Gate - a high tempo boss battle theme that owed a lot to FFVII's boss theme Still More Fighting), so Nail of the Heavens is not the only track from 1.0 still to return.

https://youtu.be/SLnCfrHMvVg?t=81

[Nestama]

As to why these tracks haven't yet returned to ARR? I guess Soken felt he just hasn't found a suitable place for them (some other old 1.0 tracks that haven't yet returned are Uematsu's Piece of Mind - the old Path Companion selection track/arrival at a starting city track, not to be confused with Soken's own track of the same name in the HW OST that is a completely different piece of music; and The Seventh Gate - a high tempo boss battle theme that owed a lot to FFVII's boss theme Still More Fighting), so Nail of the Heavens is not the only track from 1.0 still to return.

There was one dungeon I feel it could have worked well in (and I hated it for the music it has, as it just made it boring). Two missed opportunities with BGM, in fact. Hullbreaker Isle Hard could have had the 1.0 Limsa Lominsa music play as its main theme, with Nail to the Heavens being the mini-boss theme.