That is an incredible effect on a land that not only enters the battlefield untapped, but'll also provide Snow mana
Propaganda, Ghostly Prison and Sphere of Safety are staples of decks with planeswalkers as commanders, as the tax effect massively disincentivizes opponents from attacking you
It ramps you into dragons by generating colored mana, and more importantly, it lets you cast dragons directly from your graveyard once per turn
However, when she Quests, other Hero characters on your side get an extra point of Lore each on the same turn, which really gives Anna an edge
Creatures (16) 4 Street Wraith 1 Architects of Will 4 Death's Shadow 1 Lurrus of the Dream-Den 1 Scourge of the Skyclaves 1 Grief 4 Bloodbraid Marauder Planeswalkers (2) Lands (17) Spells (25) This deck isnt much different than the one above except that I dipped into green for Traverse the Ulvenwald