40 cards where the set is “war” and the card types include “planeswalker”

Ajani, the Greathearted (War of the Spark #184)
Angrath, Captain of Chaos (War of the Spark #227)
Arlinn, Voice of the Pack (War of the Spark #150)
Ashiok, Dream Render (War of the Spark #228)
A-Teferi, Time Raveler (War of the Spark #A-221)
Chandra, Fire Artisan (War of the Spark #119)
Davriel, Rogue Shadowmage (War of the Spark #83)
Domri, Anarch of Bolas (War of the Spark #191)
Dovin, Hand of Control (War of the Spark #229)
Gideon Blackblade (War of the Spark #13)
Gideon, the Oathsworn (War of the Spark #265)
Huatli, the Sun's Heart (War of the Spark #230)
Jace, Arcane Strategist (War of the Spark #270)
Jace, Wielder of Mysteries (War of the Spark #54)
Jaya, Venerated Firemage (War of the Spark #135)
Jiang Yanggu, Wildcrafter (War of the Spark #164)
Karn, the Great Creator (War of the Spark #1)
Kasmina, Enigmatic Mentor (War of the Spark #56)
Kaya, Bane of the Dead (War of the Spark #231)
Kiora, Behemoth Beckoner (War of the Spark #232)
Liliana, Dreadhorde General (War of the Spark #97)
Nahiri, Storm of Stone (War of the Spark #233)
Narset, Parter of Veils (War of the Spark #61)
Nicol Bolas, Dragon-God (War of the Spark #207)
Nissa, Who Shakes the World (War of the Spark #169)
Ob Nixilis, the Hate-Twisted (War of the Spark #100)
Ral, Storm Conduit (War of the Spark #211)
Saheeli, Sublime Artificer (War of the Spark #234)
Samut, Tyrant Smasher (War of the Spark #235)
Sarkhan the Masterless (War of the Spark #143)
Sorin, Vengeful Bloodlord (War of the Spark #217)
Tamiyo, Collector of Tales (War of the Spark #220)
Teferi, Time Raveler (War of the Spark #221)
Teyo, the Shieldmage (War of the Spark #32)
Tezzeret, Master of the Bridge (War of the Spark #275)
The Wanderer (War of the Spark #37)
Tibalt, Rakish Instigator (War of the Spark #146)
Ugin, the Ineffable (War of the Spark #2)
Vivien, Champion of the Wilds (War of the Spark #180)
Vraska, Swarm's Eminence (War of the Spark #236)

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