Cast a Spell

Summary

Cast a Spell is the basic move in Dungeon World that clerics and wizards use to invoke their magical abilities by rolling 2d6 plus their Wisdom modifier. The move works in conjunction with the Commune move, where spells are first prepared during communion and can then be cast using this move during play. When Vasso selects the Divine Favor advanced move in Session 4, he gains both Commune and Cast a Spell, making him the campaign's first spellcaster.

The mechanics grant different outcomes based on the result: success on 10+, partial success with complications on 7-9, and failure or consequences on 6 or below. Even rote spells—spells that don't require preparation and don't count against a character's prepared spell allotment—still require using the Cast a Spell move when invoked, though they provide the benefit of automatic availability without consuming preparation slots. This represents a significant expansion of the party's capabilities, introducing divine magic to a campaign that had previously operated without spellcasting.

Details

Cast a Spell functions as part of a two-step process for divine magic in Dungeon World. First, a character must use the Commune move to prepare spells during a period of prayer or meditation to their deity. Once spells are prepared through communion, Cast a Spell allows the character to invoke those prepared spells during active play.

The move is granted to Vasso through the Divine Favor advanced move, which provides him with both the Commune and Cast a Spell cleric moves. When Vasso gains this ability, he is considered a level one cleric for the purposes of spellcasting, meaning he has access to the spell list and casting capabilities appropriate to that level in the Dungeon World system.

Vasso gains spellcasting ability through his advancement selection. The introduction of Cast a Spell into the campaign marks the first time the GM, Shawn, has run Dungeon World with a spellcaster, as noted during the session when the advancement is selected.

A character's wisdom modifier directly affects their reliability with this move. Vasso has zero wisdom, meaning he rolls the dice with no modifier—making him roll at baseline probability with no safety margin, a mechanical weakness that proved critical during his first combat casting attempt.
The move requires the cleric to petition their deity for power. Vasso, a follower of Earth Mother, demonstrates this requirement when he prays: "Earth mother, please let me be super strong and let my sword sing in flesh" while attempting to cast Magic Weapon.

History

Session 4

During Session 4, Vasso reaches a level advancement and selects Divine Favor as his advanced move. This grants him both the Commune and Cast a Spell cleric moves, fundamentally changing his capabilities in the campaign.

When the advancement is announced, another player responds with surprise: "Whoa, you can cast spells now?" The GM confirms the mechanics, explaining "Yeah, so it's. You can. You're considered a level one cleric." The GM then notes the significance to the group: ["You guys got a spellcaster now"], acknowledging this as a first for both the party and for Shawn's experience running Dungeon World.

The move's connection to Vasso's relationship with the Earth Mother establishes the divine source of his spellcasting ability, though the specific spells prepared and cast using this move are not detailed in the session's available information.

Episode: "Session 5"

Cast a Spell appears in Session 5 when Vasso attempts to invoke Magic Weapon while running into combat against the Pumpkin Creature. He declares his intention: "I'm gonna pray that my weapon is strong." The GM establishes the mechanical procedure, stating "We will first resolve the cast a spell because it is a move that you have to roll," and clarifies the dice mechanic: "2d6 plus wisdom."

Vasso rolls the dice and announces the result: "Oh, no, I have no wisdom. I rolled a six." This represents a complete failure—the lowest possible result on 2d6 before modifiers. The GM responds with the ominous explanation that the rulebook provides no specific guidance for such catastrophic failures: "it doesn't even say what happens on a six, it just. It is just bad."

The consequences manifest immediately in the fiction. Rather than receiving the magical enhancement he sought, Vasso is grabbed by the Pumpkin Creature's vines and dragged through the field. The failed spell not only denies him the combat advantage he needed but actively worsens his tactical position, demonstrating how divine magic can backfire when a cleric lacks the wisdom to channel it properly. This incident reveals the mechanical vulnerability created by Vasso's zero wisdom modifier—he rolls at baseline probability with no safety margin, making spell failure a significant risk.

Episode: "Session 7"

Cast a Spell became directly relevant during Session 7 when Vasso discovered and attempted to use his Guidance rote spell. During this moment, Dayna (who portrays Vasso) asked, "Do I need to roll anything for this or is that just," prompting a rules clarification about how rote spells interact with the Cast a Spell move.

The GM confirmed that even rote spells require the Cast a Spell move: "Yeah. So I think that's what it is, is you still use. Cast a spell." This established that the automatic availability of rote spells does not exempt them from the standard spellcasting mechanics and their associated risks. The discussion clarified the mechanical balance: rote spells offer convenience and don't consume preparation slots, but they remain subject to the same success and failure conditions as any other spell invoked through Cast a Spell. As Shawn explained, "The benefit of rotes is that you don't have to prepare them, you always get them, but you could still potentially lose them as a consequence of failure."