34 cards where the full Oracle text includes “constellation —”

Agent of Erebos (Journey into Nyx #59)
Archon of Sun's Grace (Commander Masters #814)
Boon of the Spirit Realm (Commander Masters #720)
Calix, Guided by Fate (March of the Machine: The Aftermath #26)
Captivating Unicorn (Theros Beyond Death #6)
Composer of Spring (Commander Masters #739)
Daxos's Torment (Commander 2015 #18)
Doomwake Giant (Commander Masters #865)
Dreadbringer Lampads (Commander 2015 #122)
Eidolon of Blossoms (Commander Masters #892)
Eutropia the Twice-Favored (Theros Beyond Death #216)
Favored of Iroas (Theros Beyond Death #15)
Forgeborn Oreads (Journey into Nyx #98)
Goldenhide Ox (Journey into Nyx #125)
Grim Guardian (Journey into Nyx #73)
Harvestguard Alseids (Journey into Nyx #13)
Humbler of Mortals (Journey into Nyx #127)
Nessian Wanderer (Commander Masters #905)
Nexus Wardens (Theros Beyond Death #184)
Nylea's Colossus (Commander 2018 #33)
Oakheart Dryads (Journey into Nyx #133)
Pious Wayfarer (Theros Beyond Death #32)
Protean Thaumaturge (Theros Beyond Death #60)
Sage of Mysteries (Theros Beyond Death #62)
Setessan Champion (Commander Masters #912)
Setessan Skirmisher (Theros Beyond Death #200)
Shoal Kraken (Theros Beyond Death #65)
Skybind (Journey into Nyx #25)
Strength from the Fallen (Journey into Nyx #143)
Thassa's Devourer (Journey into Nyx #53)
Thoughtrender Lamia (Journey into Nyx #85)
Triton Waverider (Theros Beyond Death #78)
Underworld Coinsmith (Commander 2015 #237)
Whitewater Naiads (Commander 2018 #112)

This search is finished. Now the real work can begin.