Each figure in Arcane Legions has up to three keywords associated with it.
Various special abilities and scenario rules apply only to units that possess certain keywords. A unit will get a subfaction keyword if 100% of the figures in a unit belong to that subfaction. A unit will get a descriptor or type keyword if over 80% of the figure hit points on the unit have that descriptor or type. If a unit does not qualify for a descriptor keyword, it gets the default descriptor Mixed; if it does not qualify for a type, it gets the default type Irregulars.
|Gallic||Roman subfaction. Gallic units can be healed by Grand Druid, and increase the power of King of the Gauls.|
|Greek||Egyptian subfaction. An all-Greek army increases the power of Hellenic Pride.|
|Slavic||Mercenary subfaction (found in Roman boosters).|
|Xiongnu||Mercenary subfaction (found in Egyptian boosters). Xiongnu cavalry units benefit from Stormrider. Non-commander Xiongnu figures can be used on Roman and Egyptian cards in the unit builder without a cost penalty.|
|Construct||Construct units can be healed by Artificer, and are vulnerable to Nature Magic and Demolitionist.|
|Human||Human units are vulnerable to Resentful.|
|Mixed||Mixed units are vulnerable to Specialized and Specialist Leader.|
|Mythic||Mythic units are vulnerable to Nature Magic.|
|Undead||Undead units are vulnerable to Nature Magic and can be healed by Necromancer.|
|Arcana||Arcana units are extremely rare.|
|Artillery||Artillery units are vulnerable to Trample.|
|Cavalry||Cavalry units are vulnerable to Carnivorous and benefit from Stormrider.|
|Irregulars||Irregular units are vulnerable to Specialized and Specialist Leader.|
|Infantry||Infantry units are vulnerable to Trample and benefit from Intuition.|