Creatures such as metallic dragons, certain hags, oni and doppelgangers can polymorph into humanoids. Would one of these who polymorphs into a tiefling or drow gain their spells, or who polymorphs into a gensai gain their elemental abilities?

Note this question isn't inquiring about uses of polymorph-related spells, but rather is specifically about the repeatable action that certain creatures have of disguising themselves in their stat block.


1 Answer 1


This is answered in each of the creature's stat blocks.

For creature's such as oni, night hags, doppelgangers:

Its statistics are the same in each form.

Meaning that it keeps current statistics regardless of what specific form it takes and doesn't gain any new features.

Metallic dragons are a bit different:

In a new form , the dragon retains its alignment, hit points, Hit Dice, ability to speak, proficiencies, Legendary Resistance, lair actions, and Intelligence, Wisdom, and Charisma scores, as well as this action. Its statistics and capabilities are otherwise replaced by those of the new form, except any class features or legendary actions of that form.

A metallic dragon's stats are replaced by those of its new form (except those otherwise noted). You'll notice that the entry says class features, not racial features.

If the dragon's new form has a racial feature such as Innate Spellcasting or even Sunlight Sensitivity or the Genasi's elemental abilities then yes, they do gain those abilities. Note though that if the new form has the not-innnate-Spellcasting ability then the dragon isn't able to use it because it is considered a class feature.

  • \$\begingroup\$ Thank you. I had always read that 'statistics are the same in each form' part as referencing how elements such as creature type and ability scores do not change, but had never read it as the creature not gaining additional features. \$\endgroup\$
    – Temp
    Jan 29, 2017 at 22:05
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    \$\begingroup\$ @Zso in 5e the word statistics generally means the entire stat block unless noted otherwise \$\endgroup\$
    – Foo Bar
    Mar 15, 2017 at 13:50

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