In the hands of a skilled practitioner, thaumaturgy can be a force of terrifying destruction. At the heart of this school of magic lies the ability to call forth and command the latent aether within oneself through deep introspection.
To then mold that aether into sorcery, the thaumaturge makes use of a scepter or staff, within which is housed a medium—a natural stone imbued with magical properties. The guild is centered at the Arrzaneth Ossuary in Ul’dah, within whose hallowed halls are said to reside powers of life, death, and the beyond.
Below is a list of abilities for the Thaumaturge class up to level 50. To allow the table to fit on the page easier we have shortened some of the table headers. Cast and Recast refer to a time in seconds, while TP and MP refer to the number of TP and MP required to execute that action. If anything is listed as 0, that means there is no cast/recast time or TP/MP cost.
| Level | Ability | Cast | Recast | MP | TP | Description |
| 1 | Phantom Dart | 0 | 0 | 0 | 0 | Use thaumaturgy to cast a missile attack. |
| 1 | Exaltation | 0 | 600 | 0 | 0 | Chant in tongues for replenishment recovering MP. |
| 1 | Banish | 3 | 5 | 11 | 0 | Deals astral damage to enemies within area of effect. Reduces astral defense. |
| 1 | Scourge | 3 | 5 | 11 | 0 | Deals umbral damage to enemies within area of effect. Reduces umbral defense. |
| 2 | Blood Rite | 0 | 60 | 0 | 0 | Spill your own blood in a sacrificial rite, enhancing magic potency. |
| 4 | Sacrifice | 2 | 5 | 10 | 0 | Heals a portion of HP and additional HP over time to party members within area of effect. |
| 6 | Poison | 1 | 5 | 10 | 0 | Poisons enemies within area of effect. |
| 8 | Gravity | 1.5 | 60 | 9 | 0 | Reduces the movement speed of enemies within area of effect. |
| 8 | Slow | 1.5 | 60 | 7 | 0 | Slows the stamina regeneration of enemies within area of effect. |
| 10 | Damnation | 0 | 10 | 0 | 1000 | Haunt an enemy with visions of the hells, dealing umbral damage. Grants the caster MP in proportion to the damage dealt. |
| 10 | Punishing Barbs | 0 | 0 | 0 | 0 | Channel your pain to an enemy, redirecting a portion of damage dealt to you back to its source. |
| 12 | Bio | 1.5 | 30 | 14 | 0 | Deals umbral damage over time and reduces the attack power of enemies within area of effect. |
| 12 | Dia | 1.5 | 30 | 14 | 0 | Deals astral damage over time and reduces the defense of enemies within area of effect. |
| 14 | Dark Seal | 0 | 120 | 0 | 0 | Focus your mental energies, increasing the magic accuracy of your next cast. |
| 16 | Stygian Spikes | 3 | 60 | 11 | 0 | Armours party members within area of effect with umbral spikes, granting the ability to absorb MP from attacking enemies. |
| 18 | Absorb ACC | 2 | 60 | 15 | 0 | Transfers a portion of the target's accuracy to you. |
| 18 | Absorb ATK | 2 | 60 | 15 | 0 | Transfers a portion of the target's attack power to you. |
| 18 | Absorb DEF | 2 | 60 | 15 | 0 | Transfers a portion of the target's defense to you. |
| 18 | Absorb EVA | 2 | 60 | 15 | 0 | Transfers a portion of the target's evasion to you. |
| 20 | Sacrifice II | 2.25 | 5.5 | 18 | 0 | Heals a portion of HP and additional HP over time to party members within area of effect. |
| 20 | Silhouette | 0 | 0 | 0 | 0 | Launch a shadowy attack, dealing damage to the target, decreasing enmity. Damage type varies with equipped arm. |
| 20 | Siphon MP | 2 | 60 | 10 | 0 | Transfers a portion of the target's MP to you. |
| 22 | Initiation | 0 | 60 | 0 | 0 | Bestow your strengths on another, granting up to four enhancing statuses to an ally. |
| 24 | Banish II | 4 | 10 | 22 | 0 | Deals astral damage to enemies within area of effect. Reduces astral defense. |
| 24 | Scourge II | 4 | 10 | 22 | 0 | Deals umbral damage to enemies within area of effect. Reduces umbral defense. |
| 26 | Drain | 3 | 60 | 30 | 0 | Transfers a portion of HP from enemies within area of effect to you. |
| 28 | Bind | 2 | 40 | 13 | 0 | Renders moving enemies within area of effect immobile. Does not effect non-moving targets. |
| 28 | Paralyze | 2 | 60 | 16 | 0 | Paralyzes enemies with area of effect. |
| 28 | Silence | 1 | 40 | 17 | 0 | Silences enemies within area of effect. |
| 30 | Numbing Rime | 0 | 60 | | 1000 | Launch an icy attack, dealing damage and temporarily incapacitating the target. Damage type varies with equipped arm. |
| 30 | Paradigm Shift | 0 | 60 | 0 | 0 | Amplify your voice, increasing area of effect and reducing the range of thaumaturgy spells. |
| 32 | Mass Fear | 2 | 180 | 26 | 0 | Causes enemies within area of effect to flee in terror. |
| 32 | Siphon TP | 2 | 60 | 15 | 0 | Transfers a portion of the target's TP to you. |
| 34 | Blood Rite II | 0 | 60 | 0 | 0 | Spill your own blood in a sacrificial rite, enhancing magic potency. |
| 36 | Bio II | 2 | 30 | 30 | 0 | Deals umbral damage over time and reduces the attack power of enemies within area of effect. |
| 36 | Dia II | 2 | 30 | 30 | 0 | Deals astral damage over time and reduces the defense of enemies within area of effect. |
| 38 | Blind | 1 | 60 | 15 | 0 | Reduces the accuracy of enemies within area of effect. |
| 38 | Resurrect | 10 | 60 | 0 | 0 | Revives a KO'd target. |
| 38 | Soul Ward | 10 | 60 | 0 | 0 | Allows target to instantaneously revive upon being KO'd. |
| 40 | Emulate | 0 | 60 | 0 | 0 | Imitate the very essence of another, assuming the target's elemental resistances. |
| 40 | Shadowfall | 0 | 0 | 0 | 0 | Launch a shadowy attack, dealing damage to the target and nearby enemies. Damage varies with equipped arm. |
| 42 | Shadowsear | 4 | 180 | 88 | 0 | Deals umbral damage and increases your magic potency in proportion to the difference in HP between you and the target. |
| 42 | Stygian Spikes II | 3 | 60 | 20 | 0 | Armours party members within area of effect with umbral spikes, granting the ability to absorb MP from attacking enemies. |
| 44 | Poison II | 2 | 10 | 25 | 0 | Poisons enemies within area of effect. |
| 44 | Siphon MP II | 2 | 60 | 25 | 0 | Transfers a portion of the target's MP to you. |
| 46 | Dark Seal II | 0 | 120 | 0 | 0 | Focus your mental energies, increasing the magic accuracy of your next cast. |
| 48 | Drain II | 3.5 | 60 | 45 | 0 | Transfers a portion of HP from enemies within area of effect to you. |
| 48 | Sacrifice III | 2.5 | 6 | 32 | 0 | Heals a portion of HP and additional HP over time to party members within area of effect. |
| 50 | Contagion | 0 | 60 | 0 | 0 | Share your anguish, transferring all of your enfeebling effects to the target. |
| 50 | Numbing Rime II | 0 | 60 | 0 | 1000 | Launch an icy attack, dealing damage and temporarily incapacitating the target. Damage type varies with equipped arm. |