Relatively few of the spells that Haroun knows, or that can be found in his textbooks, will work when Haroun tries modifying them to run off two-tenths of mana, which it develops Bella can now deploy safely.  Among the spells that do work are:

『Lighting Bolt』 - shine a pulse of light on something.  Bella would need to use a lot more mana for this to start blasting holes in what it hits.

『Condense Fog』 - produces a very small and faint and brief patch of mist, at least when Bella uses it.

『Temperature Down』 - cools a targeted volume, to a degree depending on the mass and specific heat of what's targeted, and the degree of mana expended.  This spell is supposed to have a much more mana-efficient version that transfers heat instead of quieting it.  That version is usually a Tier-2 Skill, which Haroun of course doesn't know.

『Temperature Up』 - inverse of Temperature Down.

『Endless Fountain』 - inefficient form of Water Magic conjuration that scales linearly with mana and works even in a desert.  Bella can use it to produce a single droplet of water.

『Glow Fog』- combination of Light Magic and Water Magic, good to learn if you're planning to climb the Illusion skill tree.  It does what you'd expect when Bella uses it - small patch of mist, briefly lit from within.

『Evaporate』- combination of Fire Magic and Water Magic that targets heat specifically at liquid-phase rather than solid-phase material in a stationary target.

『Evaporative Glow』- combination of Fire Magic and Water Magic and Light Magic, which first lights up all the liquid-phase matter to be targeted, and then continues heating only that matter for so long as Bella maintains the spell, with the lighting leaving the material as soon as it changes to gaseous phase.  This is one of the more advanced spells at Haroun's current level, which Bella can rattle off without apparent difficulty.  If Bella keeps the casting rate down to a twentieth of a mana per second, she can maintain the spell apparently indefinitely while feeling clumsy and tired.

『Sparkles』- decorative tiny sparks that cast anisotropic light, the radiance and hue differing by the direction the spark is viewed, with further addenda to the spell producing 『Dancing Sparkles』 that move through the air and change their outputs.  Haroun can't cast this spell yet.  Bella can read it off just fine, though she only gets one or two sparkles and the fade soon after.

Relatively few of the spells that Haroun knows, or that can be found in his textbooks, will work when Haroun tries modifying them to run off two-tenths of mana, which it develops Bella can now deploy safely.  Among the spells that do work are:

『Lighting Bolt』 - shine a pulse of light on something.  Bella would need to use a lot more mana for this to start blasting holes in what it hits.

『Condense Fog』 - produces a very small and faint and brief patch of mist, at least when Bella uses it.

『Temperature Down』 - cools a targeted volume, to a degree depending on the mass and specific heat of what's targeted, and the degree of mana expended.  This spell is supposed to have a much more mana-efficient version that transfers heat instead of quieting it.  That version is usually a Tier-2 Skill, which Haroun of course doesn't know.

『Temperature Up』 - inverse of Temperature Down.

『Endless Fountain』 - inefficient form of Water Magic conjuration that scales linearly with mana and works even in a desert.  Bella can use it to produce a single droplet of water.

『Glow Fog』- combination of Light Magic and Water Magic, good to learn if you're planning to climb the Illusion skill tree.  It does what you'd expect when Bella uses it - small patch of mist, briefly lit from within.

『Evaporate』- combination of Fire Magic and Water Magic that targets heat specifically at liquid-phase rather than solid-phase material in a stationary target.

『Evaporative Glow』- combination of Fire Magic and Water Magic and Light Magic, which first lights up all the liquid-phase matter to be targeted, and then continues heating only that matter for so long as Bella maintains the spell, with the lighting leaving the material as soon as it changes to gaseous phase.  This is one of the more advanced spells at Haroun's current level, which Bella can rattle off without apparent difficulty.  If Bella keeps the casting rate down to a twentieth of a mana per second, she can maintain the spell apparently indefinitely while feeling clumsy and tired.

『Sparkles』- decorative tiny sparks that cast anisotropic light, the radiance and hue differing by the direction the spark is viewed, with further addenda to the spell producing 『Dancing Sparkles』 that move through the air and change their outputs.  Haroun can't cast this spell yet.  Bella can read it off just fine, though she only gets one or two sparkles and they fade soon after.

Relatively few of the spells that Haroun knows, or that can be found in his textbooks, will work when Haroun tries modifying them to run off two-tenths of mana, which it develops Bella can now deploy safely.  Among the spells that do work are:

『Lighting Bolt』 - shine a pulse of light on something.  Bella would need to use a lot more mana for this to start blasting holes in what it hits.

『Condense Fog』 - produces a very small and faint and brief patch of mist, at least when Bella uses it.

『Temperature Down』 - cools a targeted volume, to a degree depending on the mass and specific heat of what's targeted, and the degree of mana expended.  This spell is supposed to have a much more mana-efficient version that transfers heat instead of quieting it.  That version is usually a Tier-2 Skill, which Haroun of course doesn't know.

『Temperature Up』 - inverse of Temperature Down.

『Endless Fountain』 - inefficient form of Water Magic conjuration that scales linearly with mana and works even in a desert.  Bella can use it to produce a single droplet of water.

『Glow Fog』- combination of Light Magic and Water Magic, good to learn if you're planning to climb the Illusion skill tree.  It does what you'd expect when Bella uses it - small patch of mist, briefly lit from within.

『Evaporate』- combination of Fire Magic and Water Magic that targets heat specifically at liquid-phase rather than solid-phase material in a stationary target.

『Evaporative Glow』- combination of Fire Magic and Water Magic and Light Magic, which lights up all the liquid-phase matter to be targeted, and heats only that matter for so long as Bella maintains the spell, with the lighting leaving the material as soon as it changes to gaseous phase.  This is one of the more advanced spells at Haroun's current level, which Bella can rattle off without apparent difficulty.  If Bella keeps the casting rate down to a twentieth of a mana per second, she can maintain the spell apparently indefinitely while feeling clumsy and tired.

『Sparkles』- decorative tiny sparks that cast anisotropic light, the radiance and hue differing by the direction the spark is viewed, with further addenda to the spell producing 『Dancing Sparkles』 that move through the air and change their outputs.  Haroun can't cast this spell yet.  Bella can read it off just fine, though she only gets one or two sparkles and they fade soon after.