Game logic

Runes

18 runes, three per element. Each one is a single stroke; one to three of them, in order, make a spell.

Practice drawing them Spells

Fire

How to draw it
Fire I
Accepted drawn in 4 ways:
Alone it casts:

Fireball
Learned in:

Battle 001 (ch. 1)
How to draw it
Fire II
Accepted drawn in 4 ways:
Alone it casts:

Explosion
Learned in:

Battle 008 (ch. 3) / Battle 108 (ch. 3)
How to draw it
Fire III
Accepted drawn in 4 ways:
Alone it casts:

Fire Rain
Learned in:

Battle 007 (ch. 5) / Battle 002 (ch. 6)

Wind

How to draw it
Wind I
Accepted drawn in 6 ways:
Alone it casts:

Wind Blades
Learned in:

Battle 004 (ch. 1)
How to draw it
Wind II
Accepted drawn in 8 ways:
Alone it casts:

Wind Shards
Learned in:

Town 007 (ch. 3) / Town 107 (ch. 3)
How to draw it
Wind III
Accepted drawn in 8 ways:
Alone it casts:

Transport
Learned in:

Battle 001 (ch. 5) / Battle 004 (ch. 6)

Water

How to draw it
Water I
Accepted drawn in 6 ways:
Alone it casts:

Ice Shot
Learned in:

Battle 001 (ch. 1)
How to draw it
Water II
Accepted drawn in 4 ways:
Alone it casts:

Storm
Learned in:

Town 001 (ch. 3)
How to draw it
Water III
Accepted drawn in 4 ways:
Alone it casts:

Freeze
Learned in:

Battle 004 (ch. 5) / Battle 001 (ch. 6)

Earth

How to draw it
Earth I
Accepted drawn in 2 ways:
Alone it casts:

Earth Wall
Learned in:

Battle 005 (ch. 1)
How to draw it
Earth II
Accepted drawn in 4 ways:
Alone it casts:

Tough Armor
Learned in:

Battle 013 (ch. 3) / Battle 113 (ch. 3) / Battle 213 (ch. 3)
How to draw it
Earth III
Accepted drawn in 4 ways:
Alone it casts:

Boulder
Learned in:

Battle 010 (ch. 5) / Battle 003 (ch. 6)

Dark

How to draw it
Dark I
Accepted drawn in 8 ways:
Alone it casts:

Trap
Learned in:

Battle 003 (ch. 1)
How to draw it
Dark II
Accepted drawn in 6 ways:
Alone it casts:

Curse
Learned in:

Battle 001 (ch. 3)
How to draw it
Dark III
Accepted drawn in 5 ways:
Alone it casts:

Poison
Learned in:

Battle 006 (ch. 4)

Light

How to draw it
Light I
Accepted drawn in 6 ways:
Alone it casts:

Heal Light
Learned in:

Battle 001 (ch. 1)
How to draw it
Light II
Accepted drawn in 12 ways:
Alone it casts:

Light Armor
Learned in:

Battle 001 (ch. 4)
How to draw it
Light III
Accepted drawn in 10 ways:
Alone it casts:

Restore
Learned in:

Battle 010 (ch. 4)

How the game reads a stroke

Each rune is one stroke: lifting the stylus ends it. Size and position on the screen don’t matter.
The stroke keeps its proportions: a squashed rune scores less.
Rotation is not forgiven: about 30° off is already at the limit.
Direction matters: each rune is accepted only from the starting points and directions it has templates for.
A rune counts from a 70 % match. If the runes of a spell average 85 % or more, its power and its chance to cause statuses go from ×0.70–0.85 to ×1.35–1.50.

Runes per spell

Isaac starts with one rune per spell. He can chain two from «Battle 004 (ch. 2)» / «Battle 005 (ch. 2)» and three from «Town 013 (ch. 5)».

MP of each rune

A spell costs the sum of its runes. The first rune costs less than the second and third, and every rune gets cheaper as Isaac’s level in its element rises.

First rune
Level \ Element level	1–10	11–20	21–30	31–40	41–50
I	10	9	8	8	7
II	20	18	17	15	14
III	30	28	26	24	22

Second or third
Level \ Element level	1–10	11–20	21–30	31–40	41–50
I	20	19	18	17	16
II	40	38	36	34	32
III	55	52	49	46	43

Runes

Fire

Fire I

Fire II

Fire III

Wind

Wind I

Wind II

Wind III

Water

Water I

Water II

Water III

Earth

Earth I

Earth II

Earth III

Dark

Dark I

Dark II

Dark III

Light

Light I

Light II

Light III

How the game reads a stroke

Runes per spell

MP of each rune