Nemesis ( Final Fantasy X ) Nemesis is a superboss in " Final Fantasy X " created by the old man who runs the Monster Arena in the Calm Lands . Nemesis is an Original Creation monster and a color variation of Ultima Weapon . Often nicknamed " Omega Gold " , it is the most durable and most challenging enemy in the original versions of the game ( Penance and arguably some of the Dark Aeon s in the PAL and International versions of the game are harder ) , with 10 , 000 , 000 Hit Points and an array of spells and attacks that can instantly kill even the highest - level , best - equipped parties . To unlock this battle , the player has to capture ten of every fiend ( that can be captured ) and defeat all the other creations in the Monster Arena . Defeating Nemesis in the " HD Remaster " version earns the trophy Overcoming The Nemesis . Battle . Special damage , including Overdrives and items , will cause Nemesis to counter with Ultima . His Ethereal Cannon is a non - elemental magic - based attack against one character , and Ultra Spark will inflict many status ailments : Poison , Curse , Slow and Power Break on the party . Nemesis ' s ultimate attack is Armageddon , which hits all characters for 99 , 999 damage . The latter is graphically identical to Omega Weapon ' s Nova . Nemesis ' s attack pattern is semi - predictable . He will alternate between Ethereal Cannon and Ultra Spark , though he may use normal physical attacks in - between . He is guaranteed to use at least one physical after Ultra Spark before the next Ethereal Cannon . Use of a random physical attack gives Nemesis 3 points towards Armageddon , while any other attack ( including the obligatory physical attack in - between Ultra Spark and Ethereal Cannon ) gives him 2 ; when he reaches 19 points he uses Armageddon on his next turn . Use of Armageddon delays , rather than replaces , the next attack in his pattern . If a player missed Kimahri ' s Nova Ronso Rage from Omega Weapon , it can be acquired from Nemesis . Despite Nemesis ' s rare steals ( Lv . 4 Key Sphere , Warp Sphere ) , steal ing from it is not exactly straightforward , as it will counter with Ultima , doing extreme damage to the whole party . Mug does not cause it to counterattack . Strategy . For an easy win , the player should use three party members with fully powered Celestial Weapon s , not including Yuna . The party should use nothing but Quick Hit to deal massive damage before Nemesis gets a chance to act . When his turn is about to come up the player should switch in Yuna and summon . The aeon will get in one or two attacks before being killed , at which point the original party can return and resume Quick Hit . Nemesis will run out of HP long before Yuna runs out of aeons . This strategy guarantees a win without the party taking a single HP of damage . This strategy is still viable but no longer as effective in the International and HD Remaster versions , because Quick Hit no longer removes as much delay as the original NA / JP version . In this case , use of Auto - Life becomes practically mandatory to survive Ultra Spark and Armageddon . For an efficient means of casting Auto - Life , Rikku ' s Hyper Mighty G mix casts Auto - Life on the entire party . Assign each party member an Overdrive Mode of Comrade to easily fill up Rikku ' s Overdrive after each trigger of Auto - Life . Having a supply of Megalixirs on hand can be useful to quickly heal damage . If the player enters with the Magus Sisters and Anima ' s Overdrive bars maxed , or Yuna ' s for Grand Summon , then these can also be used to deal some heavy damage to Nemesis before it takes out the aeon . Shell can be used to reduce the damage of Ethereal Cannon and Ultima , and Protect can be used to reduce the damage of Nemesis ' s physical attack . However , neither of them will affect Ultra Spark , which can only be reduced via an increased Defense stat ( including via Cheer ) or an aeon using Shield . Rewards . Following defeat , Nemesis will drop weapons with Break Damage Limit or armor with Break HP Limit abilities and two or three empty expansion slots . Its equipment drops provide a 6 % critical hit chance bonus instead of the usual 3 % ( this is relevant to weapons and armors , but only to attacks that deal physical damage ) . Once Nemesis is defeated the player will receive the coveted key item , Mark of Conquest . Despite the bragging rights that come along with such an item , Nemesis can be fought an unlimited amount of times provided the player has enough gil . Etymology . The Japanese name for Nemesis , means " he who hath transcended / conquered all " . His name is Il Supremo in Italian , meaning " the supreme " , Summum in Spanish , which means " the top , the max " in Latin , Être Suprême , lit : Supreme One , in French , and Deus in German , which is Latin for " god " .