There are a couple of ways in which Player 1 can end up with the option to cast spells prepped by Player 2.
At the start of the game this is very simple – P1 casts a spark that P2 prepped, and deals 1 dmg. Great.
But as the game progresses this gets more and more complex, and it doesn’t really specify exactly how this works?
Things like:
- Which Breach is being used? Do you get Breach 3/4 bonuses?
- If the spell text refers to "you" then who does it refer to P1 or P2?
- If the spell lets the player discard/destroy, then is it the owner or the active player?
- If another spell/card cared whether "you had cast a spell" … then who cast that spell?
- Where does the spell go after casting?