Rule 205.3j

Planeswalkers have their own unique set of subtypes; these subtypes are called planeswalker types. The planeswalker types are Ajani, Aminatou, Angrath, Arlinn, Ashiok, Bahamut, Basri, Bolas, Calix, Chandra, Comet, Dack, Dakkon, Daretti, Davriel, Dellian, Dihada, Domri, Dovin, Ellywick, Elminster, Elspeth, Estrid, Freyalise, Garruk, Gideon, Grist, Guff, Huatli, Jace, Jared, Jaya, Jeska, Kaito, Karn, Kasmina, Kaya, Kiora, Koth, Liliana, Lolth, Lukka, Minsc, Mordenkainen, Nahiri, Narset, Niko, Nissa, Nixilis, Oko, Quintorius, Ral, Rowan, Saheeli, Samut, Sarkhan, Serra, Sivitri, Sorin, Szat, Tamiyo, Tasha, Teferi, Teyo, Tezzeret, Tibalt, Tyvar, Ugin, Urza, Venser, Vivien, Vraska, Vronos, Will, Windgrace, Wrenn, Xenagos, Yanggu, Yanling, and Zariel.