Inflicts Quantum damage equal to 90% of Rin Tohsaka's ATK to one designated enemy. Second Magic Experiment Inflicts Quantum damage equal to 45% of Rin Tohsaka's ATK to all enemies. Then, consumes 3 "Gem Energy" to additionally deal Quantum damage equal to 45% of Rin Tohsaka's ATK to one random enemy target. This repeats until "Gem Energy" is less than 3 or there are no enemy targets with current HP greater than 0. Can repeat up to 33 cycle(s). When used, if the current Skill Points are greater than 2, consumes Skill Points down to 2, and for each Point consumed, immediately gains 2 "Gem Energy."

Rin Tohsaka moves, skills and special abilities
Rin Tohsaka: 5-Star, Quantum, Erudition. Faction: Another World.
Skills
3When entering combat or after using Enhanced Skill, increases Rin Tohsaka's SPD by 20%, lasting for 3 turn(s).
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While Rin Tohsaka is on the field, additionally increases the upper limit of Skill Points by 2. When entering combat, Rin Tohsaka's ATK increases by 150%, and Quantum RES PEN increases by 15%. If Archer is in the team, Archer also gains this effect.
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Ultimates
2Inflicts Quantum damage equal to 300% of Rin Tohsaka's ATK to one designated enemy, and Quantum damage equal to 100% of Rin Tohsaka's ATK to other enemy targets. When used, recovers 1 Skill Point(s) for allies, and increases the damage taken by all enemies by 10% , lasting for 3 turn(s).
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When Rin Tohsaka uses Ultimate, gains 12 "Gem Energy."
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Talent
1When entering combat, gains 20 "Gem Energy." When an ally target consumes or recovers Skill Points, increases their CRIT damage by 35% for 2 turn(s).
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Stat Trace
10ATK increases by 8%
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Quantum damage increases by 4.8%
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CRIT damage increases by 8%
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CRIT damage increases by 8%
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ATK increases by 6%
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CRIT damage increases by 10.7%
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CRIT damage increases by 5.3%
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ATK increases by 4%
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Quantum damage increases by 3.2%
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CRIT damage increases by 5.3%
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Technique
1After using Technique, gains 10 "Gem Energy" at the start of the next battle.
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Basic Atk
1Toughness Break: 10 Inflicts Quantum damage equal to 50% of Rin Tohsaka's ATK to one designated enemy.
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Eidolon
6If one instance of the Enhanced Skill consumes 30 or more "Gem Energy," Rin Tohsaka gains "Shadow Gem" equal to the amount of "Gem Energy" consumed. While holding "Shadow Gem," enhances Skill to "Second Magic Experiment." The Enhanced Skill consumes all "Shadow Gem," does not trigger the effect that converts Skill Points into "Gem Energy," and does not consume "Gem Energy."
Requirements / unlock: Eidolon 1
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Rin Tohsaka's Skill damage dealt increases by 30%. While Rin Tohsaka is on the field, Skill damage dealt by all allies becomes 130% of the original damage.
Requirements / unlock: Eidolon 2
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Skill Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10
Requirements / unlock: Eidolon 3
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When the CRIT damage boost effect from the Talent "Gem Magecraft" applies to Rin Tohsaka, the effect can stack, up to 2 time(s).
Requirements / unlock: Eidolon 4
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Ultimate Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Requirements / unlock: Eidolon 5
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Rin Tohsaka's All-Type RES PEN increases by 20%. When using Ultimate, gains 24 "Gem Energy" and 1 extra turn.
Requirements / unlock: Eidolon 6