19 cards where the cards aren’t reprints and the card types include “nymph”

Dryad of the Ilysian Grove (Theros Beyond Death #169)
Sythis, Harvest's Hand (Modern Horizons 2 #214)
Alseid of Life's Bounty (Theros Beyond Death #1)
Goldberry, River-Daughter (The Lord of the Rings: Tales of Middle-earth #52)
Naiad of Hidden Coves (Theros Beyond Death #56)
Lampad of Death's Vigil (Theros Beyond Death #103)
Kestia, the Cultivator (Commander 2018 #42)
Forgeborn Oreads (Journey into Nyx #98)
Whitewater Naiads (Journey into Nyx #58)
Harvestguard Alseids (Journey into Nyx #13)
Oread of Mountain's Blaze (Theros Beyond Death #146)
Leafcrown Dryad (Theros #161)
Observant Alseid (Theros #24)
Dreadbringer Lampads (Journey into Nyx #67)
Nimbus Naiad (Theros #56)
Oakheart Dryads (Journey into Nyx #133)
Cavern Lampad (Theros #81)
Shanodin Dryads (Limited Edition Alpha #216)
Spearpoint Oread (Theros #141)

Though this query has ended, its relics still slumber in New Argive.