31 cards where the text includes “megamorph” and (the card is available on Paper)

Acid-Spewer Dragon (Dragons of Tarkir #86)
Aerie Bowmasters (Dragons of Tarkir #170)
Ainok Survivalist (Murders at Karlov Manor Commander #165)
Atarka Efreet (Dragons of Tarkir #128)
Aven Sunstriker (Dragons of Tarkir #5)
Belltoll Dragon (Dragons of Tarkir #46)
Deathmist Raptor (Duskmourn: House of Horror Commander #176)
Den Protector (Murders at Karlov Manor Commander #169)
Dirgur Nemesis (Dragons of Tarkir #51)
Guardian Shield-Bearer (Dragons of Tarkir #189)
Gudul Lurker (Dragons of Tarkir #56)
Herdchaser Dragon (Dragons of Tarkir #190)
Hidden Dragonslayer (Murders at Karlov Manor Commander #69)
Ire Shaman (Masters 25 #137)
Kadena's Silencer (Commander 2019 #8)
Kolaghan Stormsinger (Dragons of Tarkir #145)
Marang River Skeleton (Dragons of Tarkir #108)
Marsh Hulk (Dragons of Tarkir #109)
Misthoof Kirin (Dragons of Tarkir #25)
Monastery Loremaster (Dragons of Tarkir #63)
Ojutai Interceptor (Dragons of Tarkir #66)
Salt Road Ambushers (Murders at Karlov Manor Commander #184)
Sandstorm Charger (Dragons of Tarkir #34)
Segmented Krotiq (Dragons of Tarkir #202)
Shieldhide Dragon (Dragons of Tarkir #37)
Shorecrasher Elemental (Dragons of Tarkir #73)
Silumgar Assassin (Commander 2019 #128)
Silumgar Spell-Eater (Dragons of Tarkir #77)
Stormcrag Elemental (Dragons of Tarkir #158)
Stormwing Dragon (Dragons of Tarkir #159)
Stratus Dancer (Commander 2019 #96)

It is the moment of discovery, the triumph of the mind, and the end of these results.