Ruby Light

Ruby Light, also known as Ruby Power and Ruby Balm, is a recurring ability in the Final Fantasy universe. It is the summon Carbuncle's signatory move and usually grants the Reflect status.

Final Fantasy V
Ruby Light is Carbuncle's ability which he casts upon being summoned.

Final Fantasy VI
Ruby Light is again the ability of the Esper Carbuncle.

Final Fantasy VIII
In its summoning animation, the Guardian Force Carbuncle appears from a hole in the ground. It jumps up and casts Ruby Light on the party, granting them the Reflect status before returning into the hole.

Final Fantasy IX
Ruby Light is Carbuncle's default summon ability, which can be changed by equipping Eiko with a Diamond, Emerald, or Moonstone. In its short animation, Ruby Light only grants Reflect, but its long animation casts Protect as well.

Equipping the aforementioned add-ons on Eiko will change Ruby Light into:
 * Diamond: Diamond Light casts Vanish (short animation) or Vanish and Protect (long animation).
 * Emerald: Emerald Light casts Haste (short animation) or Haste and Protect (long animation).
 * Moonstone: Jewel Light casts Shell (short animation) or Shell and Protect (long animation).

Final Fantasy XI
In Final Fantasy XI, Ruby Light appears not as an ability, but as a gameplay element in Abyssea areas. Ruby light causes Red Pyxides (treasure chests) to drop from monsters more often and yield better items. Ruby Light can be obtained by defeating a monster in a Vision of Abyssea area using using Physical Weapon Skills, or from a Red Pyxides after a set amount of Ruby Light is accumulated (Roughly 20-30% of maximum). Some monsters such as Blood Bats, Caoineag and Pachypodium do not build Ruby Light from Weapon Skills and it must be built from Red Chest drops.

For information on Carbuncle's blood pacts with similar names to his classic ability, such as Searing Light, Shining Ruby, and Glittering Ruby, see Carbuncle.

Final Fantasy XII: Revenant Wings
Carbuncle is a Rank II Ranged Esper that can cast Ruby Balm to heal vast amounts of HP on all allies in range.

Final Fantasy Tactics
Carbuncle can be summoned to cast Ruby Light on all allies in an area for 30 MP with a speed of 25. It costs 350 Job Points to learn.

Dissidia Final Fantasy
Carbuncle appears with both his Final Fantasy VIII and Final Fantasy XI forms and casts Ruby Light in order to equal the opponent's Brave with the summoner's.