Antennae
| Rank | Effect | Flavor |
| 1 | Shows the location of all invisible enemies in line of sight. Detects all monsters within 3 tiles, even through walls or opaque clouds. Prohibits helmets. | You have a pair of small antennae on your head. |
| 2 | Range increases to 5 tiles. Prohibits helmets. | You have a pair of antennae on your head. |
| 3 | Range increases to 7 tiles. Grants see invisible. Prohibits all headgear. | You have a pair of large antennae on your head. |
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When playing in console mode, non-submerged creatures not in line of sight are revealed as { or { glyphs, depending on whether the entity is hostile or friendly. In tile mode, they appear as a variety of icons. Mimics will be identified as soon as they enter your antennae range. Attempting to move into a submerged monster (e.g., trapdoor spiders) will halt your movement without revealing the monster. | ||
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Species:: Formicids start with rank 3. Demonspawn can gain antennae as a body slot option. | ||
