Plain Walker 

Creature — Kithkin Rogue
Plainswalk
Planeswalkerwalk (This creature can't be blocked as long as defending player controls a planeswalker.)
Whenever Plain Walker deals combat damage to a player or planeswalker, planeswalk. (If you're playing Planechase, proceed to the next plane.)
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Lord Magnus 88%
$3.57#30327
"Creatures with plainswalk can be blocked as though they didn't have plainswalk."
Great Wall 88%
$1.20#30330
"Creatures with plainswalk can be blocked as though they didn't have plainswalk."
Leori, Sparktouched Hunter 87%
#11499
"Whenever this card deals combat damage to a player, choose a planeswalker type. Until end of turn, whenever you activate an ability of a planeswalker of that type, copy that ability. You may choose new targets for the copies."