I spent the majority of my first 10 hours in Arena playing against Sparky, trying out each of the decks in turn and raising my account mastery level to unlock more cards
Legendary Land Color tag templates(None) Misty Rainforest , Pay 1 life, Sacrifice this land: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle
Only after I did so did I learn that we'd be focusing on Shadowbringers for most of the character theming so I went back to researching that storyline
At this point, no one knew that the serialized Chocobo cards existed, yet prices started to climb regardless
Of course, the biggest upside of Zirda, the Dawnwaker is that its cost reduction applies to all permanents (see: the Basalt Monolith / Grim Monolith combos for Commander), and some artifact-based decks come very close to accidentally meeting Zirda, the Dawnwaker's companion restriction (for example, Modern Urza decks often only have Uro, Titan of Nature's Wrath as a permanent without an activated ability), so the unique wording on Zirda might open up new possibilities, compared to Biomancer's Familiar and Training Grounds, that will take time to explore
As devoted players bought cards, saved cards, traded cards, and bought more cards, the collectible card game genre was born