Earth · Blast
Swamp
Pours earth-based rain over a set area, turning quicksand into swamp.
Pantano
Spell scene
Choose the units and replay the cast with the cartridge’s sprites and sounds.
Press Replay or Resume to activate sound.
Spell drawing
Swamp
This unit uses its idle pose for chanting or casting.
Illustrative reconstruction: frames, palettes and effect timings come from the ROM. Part placement and drawing speed are choices of this viewer.
Outcome and status application are selected for the demonstration; they are not a battle roll.
As in the game, clouds, drops and splashes vanish together 1.05 s after the impact, when the effect is deleted. Until then the drops dim and brighten again, and each splash holds still until the next one.
The scene uses the game’s map 046 to show the terrain the spell acts on. The overlay appears on the same tick as in the game, inside its circle and with the tiles the game picks from the neighbouring cells. The spot on the map and the animation phase are choices of this view.
The terrain change (Turns quicksand into swamp) lasts 20 s, longer than the scene: it stays on the map when the scene ends.
How to cast it
Draw these runes in order, each in one stroke, while holding L.
MP cost
It goes down as Isaac’s level in each rune’s element rises.
| Element level | 1–10 | 11–20 | 21–30 | 31–40 | 41–50 |
|---|---|---|---|---|---|
| MP | 50 | 47 | 44 | 41 | 38 |
Aim
Draw a circle. Touch a centre inside the range and drag out to set the radius.
Affects: Enemies
What it does
- Power
- 100
- Duration
- 10 s · 600 ticks
- Cast range
- 100 px
- Radius
- 65 px
- Hits after
- 0.35 s · 21 ticks
Status: Terrain
- Chance
- Always
- Lasts
- 20 s · 1200 ticks
Terrain: Turns quicksand into swamp
Terrain it paints
A circle of 65 px, for 20 s. The 8 × 8 px cells whose centre is inside are painted.

Inside its circle it removes dried swamp, even when another spell put it, while it lasts.
It appears at once and, when it ends, vanishes with no animation: the game has no entry or exit animation. The 3 frames loop the whole time. It is only the picture: the terrain status gives the effect on units. The layer’s 32 tiles with the game’s palette and frame timing; not a screenshot.
Against creatures
It heals earth creatures a little instead of hurting them (1/16 of its power) and does ×1.5 to wind ones. Against the rest, normal damage.
Earth creatures: Gnome, Rune Gnome, Mush-Mushy, Brown Shog, Mud Golem, Stone Golem, Earth Hound, Earth Dragon, Earth Mage, Geh Olg
Wind creatures (×1.5): Silfeed, Runefeed, Green Shog, Harpia, Elpia, Gale Hound, Acrobat, Gale Dragon, Wind Mage, Trista
Power at cast
Before the target’s element and defenses. Each value is the game’s own formula.
Power:
Similar spells
The 6 spells that run on the same game code as this one. Only what changes between them is shown.
| Spells | Element | Traits | MP (level 1–10) | Cast range | Duration | Radius | Power | Runes | Status chance | Status lasts | Status | Affects | Terrain |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Storm | Water | — | 20 | 100 px | 0 s | 65 px | 120 | 1 | 100 % | 20 s | Terrain | Enemies | Hardens magma |
| Fire Rain | Fire | — | 30 | 100 px | 0 s | 65 px | 330 | 1 | 100 % | 20 s | Terrain | Allies and enemies | Turns the ground into magma |
| Swamp | Earth | — | 50 | 100 px | 10 s | 65 px | 100 | 2 | 100 % | 20 s | Terrain | Enemies | Turns quicksand into swamp |
| Earth Explode | Fire | — | 140 | 200 px | 0 s | 100 px | 405 | 3 | 100 % | 20 s | Terrain | Allies and enemies | Turns the ground into magma |
| Death Rain | Dark | — | 100 | 100 px | 1 s | 75 px | 1,080 | 3 | 39.8 % | 18 s | Death rain | Enemies | — |
| Love Song | Light | Heals | 90 | 100 px | 3 s | 75 px | 675 | 3 | — | — | — | Allies | — |