Spell circles are how witches on The Boiling Isles cast spells, which is drawing a circle in the air using either their fingers or a staff. The intensity of the spell depends on the size of the circle. The bigger it is the more powerful the spell.
The circle can be drawn with a fingertip, a sweeping gesture of the hands, a tracing motion with the feet, a training wand, or the end of a witch's staff. Two, and possibly more, witches can cooperatively draw a single spell circle. Witches can cast multiple iterations of a spell by creating a single spell circle then slapping it with the palm of the hand. The witch then sweeps their hand which creates multiple identical spell circles. A witch can even cast two spell circles with each hand.
A spell circle requires magical energy in order to function. This means the caster must either have their own supply of magical energy, such as a magic bile sac attached to a witch's heart, or the caster must be on the Boiling Isles or another magical place so as to directly access the fallen titan's power in the air.
Drawing the Spell Circle can also be done using a pen or pencil as long as a glyph is included. It is revealed in "The Intruder" that in order to cast a specific spell, a specific glyph within the circle must be included, which can be seen for a brief moment. It is reasonable to assume that drawing the glyph within the circle was how witches use to do magic until these practices were forgotten when they started mastering more efficient methods (ex. drawing power from magic bile sac, special organs exclusive to witches on the Boiling Isles).
According to "Adventures in the Elements" the Boiling Isles is full of magic glyphs hidden within nature. The light glyph can be found in the stars; the ice glyph within snowflakes; the plant glyph on the stigma of a flower; and the fire glyph is a mark left by a burn.
In "Escaping Expulsion", Lilith discovers the glyphs are like words that command the magic around them instead of containing it like witches do. that by drawing a "glyph combo" by chaining glyphs in a certain order, it is possible to organize the commands over magic and thus achieve different specific effects. This runs counter to the incorrect method used by Eda of overlapping glyphs on each other, as this causes the magic to be confused and the spell to go wrong.
|The glyph for illumination is a large triangle in the circle with a smaller triangle and circle on top. Down the middle a long line with two smaller lines across, side by side within the large triangle.
When cast it generates a floating sphere of light. The intensity of the spell can be changed depending on the size of the glyph/spell circle. The light spell is considered a basic spell that can be cast at a very young age.
|The glyph for conjuring ice is a large diamond with a line down the center, sat on another line across the bottom of the circle. Across the diamond is a curved line and sometimes a smaller diamond is included at the bottom.
When cast it causes a pillar of ice to form. The diameter, height, and speed of growth of the pillar is dependent upon the size of the glyph.
This following glyph for conjuring plants resembles a flower. It features an upside down triangle with a line across the bottom, connected to a line heading down to a circle at the bottom with a dot in the center. Two other lines stick out at the top of the circle.
When cast it causes one or more flowers (or other plants such as trees) to sprout from the glyph. The plants can be any size, even towering over people.
|The glyph for conjuring fire features a larger circle at the bottom of the spell circle with a dot in the centre. On top is a smaller circle with a curved triangle on top#. Another curved triangle is also included on top of the bigger circle which goes over the smaller circle.
When cast it conjures a ball of fire. If the glyph is on the surface of an object, it will set that object on fire.
|Combining the light and fire with two ice glyphs casts snow. First used by Lilith when Eda tried overlapping the glyphs resulting in an out of control spell of growing ice spikes. Lilith used this combination to counteract Eda's spell, turning the growing ice spikes into snow.|
- The Spell Circle is similar to a Magic circle, which is a circle of space marked out by practitioners of many branches of ritual magic.
- The Spell Circle patterns are similar to glyphs, which are elemental symbols within an agreed set of symbols, intended to represent a readable character for the purposes of writing.
- It also bears the common to the Sling Rings and the Tao Mandalas from Doctor Strange due to:
- Uses and gained by magic.
- Forms a circle and emits light.
- Eda has the same color references the common colors on the Master of the Mystic Arts.
- Coincidentally, the method witches of Boiling Isles conjuring the Spell Circle (drawing a glowing circle in the air) is pretty much similar to how Makai Knights summon their armor in Japanese adult dark fantasy tokusatsu series GARO.