Unless otherwise stated, you must win the puzzle by inflicting lethal damage to your opponent before the turn ends. This can be as late as during the end step, if necessary. Your solution must work for all possible outcomes, such as your opponent's actions and blocking decisions (see below.)
Unless otherwise stated, you begin each puzzle at the beginning of your first main phase. You have already drawn a card and completed your upkeep and all associated triggers. You have not yet played a land, activated loyalty abilities of Planeswalkers you control, or attacked.
Your Opponent's Resources / Actions
Unless otherwise stated, your opponent has no cards in hand and no other permanents in play (including no lands - despite the lack of realism there.) This means the only actions you need to consider are activated abilities with no mana cost. Puzzles with opponent actions will offer more information on this.
You cannot assume that your opponent will block a certain way, unless they are somehow forced to. Your solution must satisfy all possible blocking scenarios and always deal lethal in order to be correct.
Sometimes you will see six-sided dice placed on cards. These are meant to indicate counters, of whatever type is most reasonable to be there. On most creatures they will be +1/+1 counters, on most artifacts and lands they will be charge counters, and on most Planeswalkers they will be loyalty counters.
If the card specifies a type of counter itself, however (like Icatian Javelineers or Raging Ravine), that will dictate which type it is.
For -1/-1 counters, we will use a separate graphic to avoid confusion.
This will often be clarified using text in the puzzle, but if not, these are the standard things that dice represent.
Unless otherwise stated, all zones not displayed are empty. Neither you nor your opponent have cards in graveyards or in exile.
In any puzzle in which you are able to draw cards or otherwise access your library, the puzzle will stipulate some known or assumed information about the library. Most commonly, this will be an assumption that the remaining cards in your library are all some type of land, but occasionally some number of top cards may be known or visible.
Occasionally, your own life total might appear to matter - for cards like Anguished Unmaking, for example. If we require you to consider your own life total in a puzzle, it will be displayed.
If your life total is not shown, you may assume it is irrelevant and effectively infinite.
For competitive-level Patrons, you may submit only one answer each week.
Your answer is timed from when you open the puzzle to when you submit it - including any time spent with the closed.
For details on how points are awarded with respect to correctness and speed bonuses, visit scoring.possibilitystorm.com.
Answer submissions must be clear and easy to follow. If it does not seem obvious to us what you are trying to communicate, your answer may be judged as incorrect.
We will make our best efforts to understand your steps and give you the benefit of the doubt whenever possible.
Anything clear and incorrect, even an innocent slip-up like mis-counting power, will be judged as incorrect.
See our full marking policy here.
If you manage to deal more damage than the puzzle asks for, this is called a "Puzzlebreaker".
For a correct puzzlebreaker, you'll earn a 2x point multiplier for your answer, and will also receive one of our exclusive "Puzzlebreaker" promo tokens!
Be careful when submitting these, as if it is found not to work, the answer will be marked as incorrect.
This is a living document, so leave your question in the comments below and we will edit the answer into this document as soon as we are able.