Theme helps too
I even remember some of those places." P/T Number 126 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (8/7/2020) If Goblin Guide is attacking a planeswalker, that planeswalker's controller is the defending player
As a Reserved List staple, it's a cornerstone in high-powered formats like Commander (EDH) and Vintage
The way this combo works is by using Saheeli's -2 ability to create a copy of Felidar Guardian, giving that token haste and triggering its enter the battlefield ability
On its reverse, it features the card back used for Magic: The Gathering cards - the result of having been printed on Magic: The Gathering card stock as a test run