21 cards where the card types include “legend” and (the full Oracle text includes “when” or the full Oracle text includes “at the beginning” or the full Oracle text includes “:”) and the number of identity colors ≤ 0 and the card types exclude “eldrazi” and the ca…

Nykthos, Shrine to Nyx (Theros #223)
Gemstone Caverns (Time Spiral Remastered #280)
Inventors' Fair (Kaladesh #247)
Geier Reach Sanitarium (The Lost Caverns of Ixalan Commander #335)
Mikokoro, Center of the Sea (Dominaria United Commander #217)
Dark Depths (Dominaria Remastered #244)
The Grey Havens (The Lord of the Rings: Tales of Middle-earth #255)
Baldur's Gate (Commander Legends: Battle for Baldur's Gate #345)
Boseiju, Who Shelters All (Champions of Kamigawa #273)
Hall of the Bandit Lord (Champions of Kamigawa #277)
Eye of Ugin (Modern Masters 2015 #242)
Matzalantli, the Great Door // The Core (The Lost Caverns of Ixalan #256)
Matzalantli, the Great Door // The Core (The Lost Caverns of Ixalan #256)
Azor's Gateway // Sanctum of the Sun (Rivals of Ixalan #176)
Azor's Gateway // Sanctum of the Sun (Rivals of Ixalan #176)
Miren, the Moaning Well (Saviors of Kamigawa #163)
Untaidake, the Cloud Keeper (Champions of Kamigawa #285)
Gallifrey Council Chamber (Doctor Who #188)
The Tabernacle at Pendrell Vale (Masters Edition III #212)
Gods' Eye, Gate to the Reikai (Betrayers of Kamigawa #164)
Rath's Edge (Nemesis #142)
Paliano, the High City (Conspiracy #65)
R&D's Secret Lair (Unhinged #135)

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