Two of those are really useful as tools (Jace Beleren and Garruk Wildspeaker), two are really strong for casual play (Liliana Vess and Ajani Goldmane), and the last is Chandra Nalaar, the not-that-great at 5 mana
Named after the Ravnica Guild of the same name, Golgari decks see play across many formats, including as one of the top decks in Vintage, the game's most powerful format
This means that Exploration tends to lose its effectiveness pretty quickly unless you have reliable ways to continue hitting land drops every turn
But I hate all other planeswalkers
Admittedly, there are more effective wincons using this infinite, but sacrifice synergies are definitely worth considering
Three strength, three willpower, and one lore for questing are all nothing to write home about for a cost of 3 ink, and there are definitely more exciting alternatives to deploy