Ruin II, known as Ruinra in the Japanese version, is a spell in Final Fantasy XIV and a stronger version of the Ruin spell. It is available to Arcanist at level 38. Ruin II deals unaspected damage with a potency of 80 and inflicts the Blind status for 10 seconds to a single enemy, and has no casting time. The spell can only be used by Arcanists, Scholars, and Summoners.
In addition, the ability can also be used by Tristan Nightflicker during his boss fight in the "Primal Burdens" quest.
Ruinra I-III are magic attacks available only to Morrow to use. The spells can only be learned from the Ruinra version of the Cait Sith signet. All Ruinra spells deal non-elemental magic damage to all enemies and cost 29 MP to use.
In the original free-to-play versions of the game, Ruinra I-III could be used by any party member equipped with the Ruinra-type Cait Sith signet. Each version of the spell dealt more damage depending on the summon's rank and had increased MP costs for each version of the spell.