The most popular theory seems to be that Battle is a revamped version of Skirmish, a mechanic that was dreamt up (and later abandoned) as a design for the War of the Spark set
These prices are determined by the average market price from cards listed on TCGPlayer, and are subject to fluctuations as time passes and the competitive meta evolves
Given their unique mechanics, the Transformers cards are only playable in Commander, Legacy, and Vintage formats despite appearing in a standard set
Pikachu became the expansions main attraction, although several other special illustration rares have retained substantial value: Prismatic Evolutions Prismatic Evolutions launched as an Eevee-focused special expansion containing 180 cards
The enchantment gives every nonland card in your graveyard the escape mechanic, meaning you can recast them by paying their normal mana cost plus exiling three other cards from your graveyard as an additional cost
theres a reason that Growth Spiral is in over 200,000 decks on EDHREC