Game logic
Runes
18 runes, three per element. Each one is a single stroke; one to three of them, in order, make a spell.
Fire I
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Fireball
- Learned in:
- Battle 001 (ch. 1)
Wind I
How to draw it
Accepted drawn in 6 ways:
- Alone it casts:
- Wind Blades
- Learned in:
- Battle 004 (ch. 1)
Water I
How to draw it
Accepted drawn in 6 ways:
- Alone it casts:
- Ice Shot
- Learned in:
- Battle 001 (ch. 1)
Earth I
How to draw it
Accepted drawn in 2 ways:
- Alone it casts:
- Earth Wall
- Learned in:
- Battle 005 (ch. 1)
Dark I
How to draw it
Accepted drawn in 8 ways:
- Alone it casts:
- Trap
- Learned in:
- Battle 003 (ch. 1)
Light I
How to draw it
Accepted drawn in 6 ways:
- Alone it casts:
- Heal Light
- Learned in:
- Battle 001 (ch. 1)
Fire II
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Explosion
- Learned in:
- Battle 008 (ch. 3) / Battle 108 (ch. 3)
Wind II
How to draw it
Accepted drawn in 8 ways:
- Alone it casts:
- Wind Shards
- Learned in:
- Town 007 (ch. 3) / Town 107 (ch. 3)
Water II
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Storm
- Learned in:
- Town 001 (ch. 3)
Earth II
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Tough Armor
- Learned in:
- Battle 013 (ch. 3) / Battle 113 (ch. 3) / Battle 213 (ch. 3)
Dark II
How to draw it
Accepted drawn in 6 ways:
- Alone it casts:
- Curse
- Learned in:
- Battle 001 (ch. 3)
Light II
How to draw it
Accepted drawn in 12 ways:
- Alone it casts:
- Light Armor
- Learned in:
- Battle 001 (ch. 4)
Fire III
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Fire Rain
- Learned in:
- Battle 007 (ch. 5) / Battle 002 (ch. 6)
Wind III
How to draw it
Accepted drawn in 8 ways:
- Alone it casts:
- Transport
- Learned in:
- Battle 001 (ch. 5) / Battle 004 (ch. 6)
Water III
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Freeze
- Learned in:
- Battle 004 (ch. 5) / Battle 001 (ch. 6)
Earth III
How to draw it
Accepted drawn in 4 ways:
- Alone it casts:
- Boulder
- Learned in:
- Battle 010 (ch. 5) / Battle 003 (ch. 6)
Dark III
How to draw it
Accepted drawn in 5 ways:
- Alone it casts:
- Poison
- Learned in:
- Battle 006 (ch. 4)
Light III
How to draw it
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.
| 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 |
| 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 |