Spellblights are rare and unusual magical conditions that uniquely affect spellcasters, including creatures that use spell-like abilities. Spellblights are curses, some functioning continuously and others manifesting only when the afflicted creature attempts to cast a spell or use a spell-like ability. A creature that lacks the ability to cast spells or use spell-like abilities cannot usually be afflicted by a spellblight.

Unlike many magical effects, a spellblight usually persists in an antimagic field, though because they often affect spellcasting, their effect is typically lessened in such a field.

Gaining Spellblights
There are many ways a spellcaster can become afflicted with a spellblight. These conditions can be gained by way of a bestow curse or major curse spell, as well as spontaneously with a number of unusual circumstances, many of which are detailed below.

Areas of Spellblight: Typically, the act of casting a spell has little chance of inflicting a spellblight, but there are some areas of magical instability where the mere act of casting a spell within the area can endanger a spellcaster. There are two main types of spellblight areas. In areas of minor spellblight, each time a spellcaster casts a spell, she must succeed at a DC 14 Will saving throw or be affected by a random minor spellblight. In areas of major spellblight, the caster must succeed at a DC 22 saving throw or contract a major spellblight. Due to the strange and random nature of such areas, their effects are not always consistent. There are areas that inflict a single type of spellblight, and areas that are easier or harder to resist with each spell cast.

Curses and Other Spells: All spellblights can be inflicted upon spellcasters with a bestow curse or major curse spell. Bestow curse can bestow any minor spellblight, while a major curse is required to afflict a spellcaster with a major spellblight. Other spells may inflict a specific spellblight or may allow the caster to select any spellblight as part of the spell. A successful saving throw against the spell prevents the spellblight from taking hold.

Optional Ways to Acquire Spellblights
GMs may choose to include the following methods of acquiring spellblights.

Antimagic Field: The first time a spellcaster attempts to cast a spell within an antimagic field, there is a chance she will spontaneously gain a major spellblight. The caster must succeed at a Will saving throw (DC 15 + the caster level of the antimagic field or DC 23 if there is no caster level for the effect).

Spell Resistance Reflection: When a spellcaster casts a spell on a creature that possesses spell resistance, if the spellcaster rolls a natural one on their caster check they may become afflicted with a spellblight. The failed spellcaster must succeed on a Will saving throw (DC 15 + the spell’s level) or gain a spellblight. A failed spell of 4th level or lower results in a minor spellblight, while a failed spell of 5th level or higher results in a major spellblight.

Spell Turning: When a spellcaster is warded with a spell turning, and so is the creature he or she attacks, such occurrences usually create a resonance field as described in the spell’s description. Instead, the spellcaster who cast the original effect can choose not to create the resonance field and both spellcasters are affected by a major spellblight. The spell that triggered the resonance field drains away without effect.

Teleportation Mishap: A spellcaster who casts a teleportation spell that results in a teleportation mishap has a chance of gaining a spellblight. The spellcaster who cast the teleportation spell must succeed at a Will saving throw (DC 15 + the spell level of the teleport) or gain a major spellblight.

Use Magic Device: When a spellcaster rolls a natural 1 while attempting to use a magic device with the Use Magic Device skill, she can choose to risk gaining a minor spellblight instead of not being able to activate the item for 24 hours (Will negates DC 10 + item’s caster level).

Removing Spellblights
While the most severe symptoms of a spellblight may manifest only episodically, the condition is often tenacious and difficult to remove. Each spellblight lists conditions for its removal, and can also be removed as if it were a curse (with remove curse, break enchantment, and so on). The caster check DC to remove a minor spellblights is 20; the DC to remove a major spellblight is 30. The DC to remove the spellblight is reduced by 1 with each day that passes (minimum DC 10). Using anything other than a curse-removing spell to remove a spellblight imposes a –5 penalty on the caster level check. Any spellblight can be removed automatically, without a caster level check, with mage’s disjunction, miracle, or wish.

The following tables list minor and major spellblights. When called to randomly determine a spellblight, roll on the appropriate table.

Table: Random Minor Spellblights
d10 Result
1 Caster Blank
2 Caster Croak
3 Confounded Casting
4 Disassociation
5 Ebon Eyes
6 Eldritch Ague
7 Hemoculysis
8 Lassitude
9 Ritualistic Obsession
10 Spell Addiction
Table: Random Major Spellblights
d10 Result
1 Eldritch Cataracts
2 Nameless Dread
3 Negated
4 Obsessive Fixation
5 Phase Blight
6 Spell Burn
7 Spell Sap
8 Transference Block
9 Vertigo
10 Roll twice on the minor spellblight chart. The spellcaster is afflicted with both
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