Prototype
Decks are drawn fresh each game: 20 units of your element plus 10 support cards.
Official rules are still being finalised. Until then, this prototype uses these guesses:
Full rules: Tutorials
Pass the device
From the tutorial: 30-card decks, 7-card hand, up to 3 units in the arena, 2 dice per turn (1 reroll), max 1 Event per turn. Win with 8 Victory Points, 8 defeated units, or when the opponent has no units in the arena.