It's worth noting that, in Japan, the name of the spell that's usually known to us as "Warp" is called Degeon--short for De-Dungeon. In FFII, it became versatile as not only an escape spell but also an instant-death spell for enemies. By FFVI, Degeon was exclusively an instant-death spell, and Tina's Magitek Armor was equipped with a similar ability called Degeonator; in the American version, these were called "X-Zone" and "X-Fer" respectively. In the American version of FFVII, it was called "Remove." Finally, the Degeonator ability was reprised in FFVIII as one of Quistis's blue spells, called "Degenerator" in the American version.

My point is that Degeon/Warp/X-Zone/Remove made its way into the post-FFVI era, although its purpose was changed over time.