|Natural Magic, Caster, Caster link, Juice, Scroll, Magic Item, Spell, Grandiocosmic Strings, Nodes|
 Proposed Canon
Casters are units that can cast Magic Spells and use scrolls. These alter the world around the Caster in some way, gather information, or otherwise provide a result that would be considered extraordinary or supernatural in the Real World. Casters are rare and therefore highly prized by the Sides they belong to. Frequently, the magical abilities provided by a specific caster form an important part of the strategy of the Side.
Every caster belongs to one magical Discipline (e.g. thinkamancy or croakamancy) and can cast spells from that discipline. Some casters can also cast spells from outside their discipline. Casters are titled by their magic class or discipline, so a caster specializing in Lookamancy is called a Lookamancer, and a caster who does general Hippiemancy would be called a Hippiemancer.
Within their discipline casters are rated according to their class, most commonly as Novice/Adept/Master. It is implied that these represent discrete steps in insight and magical abilities. However, only a few very specific examples of such abilities have been shown. This insight is gained through personal study rather than level, though increases in level do help.LIAB Text 45
Some units (e.g. Archons) can cast a limited set of spells from one or more disciplines. These are not considered casters and presumably cannot attain a higher class in a discipline or participate in caster links.
 Using Magic
A caster seems to automatically know some of the spells available to him. He can also learn spells from other casters IPTSF Text 23 or work them out through experimentation. The potency of a caster's spells increases with his level IPTSF Text 20. To cast a spell a caster expends some of his juice TBFGK 104. Since the amount of juice a caster has is limited, the amount of magic a caster can perform during one turn is also limited TBFGK 90.
All casters have extra senses. One for magic in general, and one related to their discipline. For example, all casters are able to gain an innate understanding of the magic that lies behind a scroll.LIAB Text 59 But only Thinkamancers have an innate sense for the vibrations of a G-String.LIAB Text 38
Casters can use scrolls to cast spells without expending juice. Scrolls also allow a caster access to disciplines and spells that she does not know TBFGK 126. It is unknown if there are restrictions on the disciplines or spells that can be made into scrolls.
Some casters know (and can cast) spells outside their discipline. The talent for this differs strongly between casters, from (almost) none (Sizemore Rockwell) to quite a lot (Wanda Firebaugh) TBFGK 13. The ability to cast spells outside one's discipline is dependent on levelIPTSF Text 19, current casting bonuses, and familiarity with the discipline. It is even possible for a caster to attain Adept or Master rank in a discipline that he does not belong to, though it is unknown if there are restrictions on the disciplines or spells accessible in this way.
Like Warlords, Casters are commanders and can lead units in combat TBFGK 84a. However, they almost never do so since they are too rare and valuable to risk. Moreover, casters do not normally have the Leadership ability and do not grant a Leadership bonus to units under their direct command. However, some casters can grant a special bonus to particular units, presumably limited to those directly tied to their magical specialty. For example, Dirtamancers provide bonuses to golems under their command, and Croakamancers provide bonuses to uncroaked units. And at least one subject of the Summon Perfect Warlord Spell, Parson Gotti, is a dual class Warlord/Caster, able to perform the functions of both.
In some situations, casters can also grant abilities to units under their command. For example, a Croakamancer can grant the Dance-Fighting special ability to Uncroaked units under its command TBFGK 127. The Caster would likely need to possess the dance-fighting ability on their own to be able to bestow it to other units.
 Caster Links
- Main Article: caster link
A Thinkamancer can join one or two other casters together into a caster link allowing those casters to cast powerful spells, multi-discipline spells, or create multi-discipline magical items or scrolls. The most powerful spells and items (apart from those created and used by Titans) are created by linked casters.
 Magic Kingdom
- Main Article: Magic Kingdom
The Magic Kingdom is an island that can only be entered by casters through portals in Erfworld cities. Communities of barbarian casters live here, and the island is divided into eight sections, one for each class of magic. Casters of the various disciplines co-mingle freely, including those who are members of different sides, who may enter and leave through Portal Park to socialize or deal with other casters for their Rulers.
Casters can receive orders from Warlords and Rulers while the caster is in the Magic Kingdom.
 Caster Creation
Casters are created in the same way as warlords; when a Side pops a warlord, there is a chance it will get a caster instead. The Side also does not get to choose the type of caster it receives. Some Erf culture appears to hold that the Titans decide when a Side will pop casters, or that the need of the Ruler influences what is popped. There is no way to intentionally pop a caster.
 Croaked Casters
Once a caster is croaked they may be uncroaked. An uncroaked caster does not retain spellcasting abilities and functions as generic uncroaked infantryErf-b1-p77a.
It is currently unknown if casters can still cast after being decrypted.
 Known Casters
- For a table cross-referencing casters by side and discipline, see: Known casters
- Hocus Pocus
- Adderall Hawk, Mathamancer
- Delphie Temple, Predictamancer
- Marie Lavraie, Predictamancer
- Spenser, Findamancer
- Ace Hardware, Dollamancer
- Holly Shortcake, Dollamancer
- Ken, Dollamancer
- Teddy Clothespin, Dollamancer
- Vanna, Turnamancer
- Bowie, Changemancer
- Lloyd, Dittomancer
- Sizemore Rockwell, Dirtamancer
- Bunny, Thinkamancer
- Hubble, Lookamancer
- Isaac, Thinkamancer
- Roger Victor Clarence. Thinkamancer
- Jack Snipe, Foolamancer
- Maggie, Thinkamancer
- Misty, Lookamancer
- Orwell, Lookamancer
- Janis Atlantis, Florist
- Labeler, Signamancer
- Olive Branch, Florist
- Uhura, Date-a-mancer
- Rusty Trombone, Shockmancer
- Wanda Firebaugh, Croakamancer
- Cubbins, Hat Magician
- Jeftichew, Carnymancer
- Charlie, Carnymancer
- Benjamin, Moneymancer
- Betsy Murgatroyd, Healomancer
- Clay Dice, Luckamancer
- Moothfott, Moneymancer
- Pierce, Healomancer
 Caster Creation
Casters are extremely rare, largely because they cannot be popped intentionally.
After a side pops its first caster, popping another caster becomes much more unlikely.
Many sides seem to have Thinkamancers (at least three among the combatants of the Battle for Gobwin Knob). They may be more commonly popped than members of other Disciplines. Conversely, even in the Magic Kingdom, Dirtamancers are apparently rare and in demand.
Some additional possibilities on how casters' numbers might be restricted:
- As a side has existed for more turns, the chance of popping a caster decreases.
- Each time a side pops a caster, the chances of popping another decreases.
- There is a limit on the number of casters in the world (could be based on each type)
- The odds of a caster popping decreases as the number of casters in the world increases
- There is a hard limit on the number of casters in the world
- It may be that sides are limited to a maximum number of casters. For example, three or fewer, with it being rare but possible to pop up to three casters. Capture, however, would be more beneficial since it allows for more than the minimum number and it means the casters may have already leveled.
 Casters, Sides, and the Magic Kingdom
The Magic Kingdom is a special location that only casters can enter. Casters from active sides can enter and exit the Magic Kingdom via portals. However, some casters in the Magic Kingdom do not belong to sides on Erfworld. The number of casters in the Magic Kingdom may, at any given time, outnumber those elsewhere on Erfworld.
 Caster levelling
Leveling for casters may work differently then for other units. If casters need to kill enemy units to gain experience then leveling could be very difficult due to the fact that casters tend to be kept in capital cities. Some types, such as florists, might not even possess any magical means to croak another unit. Note that in LIAB Text 45, Sizemore says that he has gained three levels recently, two from croaking units ("from traps and combat") and one from other activities ("from all of the city rebuilding"). So it seems canon that not all caster leveling comes from croaking units.
It is possible that casters gain experience by using magic or by simply participating in a battle in any way.