By Planeswalker debut cards, do you mean the first appearance of each planeswalker?
Have you tried just using Gatherer and just searching for 'Planeswalker'? Or you could look on MtG Wiki.
Of course there are some Planewalkers who first showed up as creatures, so that could be their "debut". I'm looking you at Ob Nixilis, Narset and Nicol Bolas.
I want to collect 1 of each.
Thanks.
Have you tried just using Gatherer and just searching for 'Planeswalker'? Or you could look on MtG Wiki.
So you would be look for the likes of:
Ajani Goldmane
Jace Beleran
Liliana Vess
Chandra Nalaar
Garruk Wildspeaker
etc...
For ones with multiple printings you just need to figure out which was the earlier set. Which isn't that difficult to figure out.
Of course there are some Planewalkers who first showed up as creatures, so that could be their "debut". I'm looking you at Ob Nixilis, Narset and Nicol Bolas.