It's the Magic: You Are Here, Part Four

Three weeks ago, I introduced a tactical multiplayer Magic rules set involving a map and rules that altered areas of effect and ranges of attack. Two weeks ago, I posted that map and finished the core rules. Last week, I went over minion rules and this week, I'm finishing up the project with player-as-planeswalker rules. 

Summoning a Planeswalker

            Summoning

            Whenever the active player would like the aid of another player, they may suggest a mana cost to that player. That player may decline and may also decline further offers for the rest of the turn. If they approve of the cost, the active player may cast them from their hand by paying that mana cost and discarding a card

The name of a player planeswalker spell is the summoned player’s name.

A player’s mana cost is the same from the time it is approved until the end of the game.

Once a player has a mana cost, any other player may cast them by paying their cost (the mana cost plus discarding a card). A player cannot summon themselves.
Casting a player as a planeswalker works like casting a planeswalker spell. It goes on the stack and may be countered. Its colors, mana costs, and characteristics are for those of a planewalker spell with that player's name, thier mana cost, the colors reflected by their mana cost, its subtype is that player's first name or nickname, its loyalty is equal to its converted mana cost plus one, it has no text.

You will pretty much be casting this, but hopefully better.

Inevitably better, really.

         On the Battlefield

         A player summoned as a planeswalker is a player planeswalker.

The player planeswalker comes into play with a number of loyalty counters equal to their converted mana cost plus one.

That player planeswalker’s type is their first name or nickname. Their colors are the colors used to pay their costs.

A player planeswalker is a planeswalker and is thus a permanent and enters the battlefield under the control of the player who summoned them.

        The Planewalker Player becomes a Minion (see above) to their controller until they are no longer a planeswalker player. If another player gains control of them as a permanent (with, say Volition Reins) they will then be that player's minion until that effect ends or they are no longer a player planeswalker.

        Whenever a player planeswalker takes damage, they both lose that much life and remove that many loyalty counters from themselves (if possible.). Losing life without taking damage does not affect Loyalty.

        A planeswalker player may only play one spell per turn. In addition, they must gain or lose loyalty equal to the converted mana cost of that spell as an additional cost to play that spell. They may play instants and spells with flash during other players’ turns with the same restrictions and costs. They may activate any number of abilities and attack as normal (save restrictions for being a minion).

        A planeswalker player is considered to be at the same location on the board as their controller and may not move independently or gain control of any planes.

Ending Your Service

Any effect that would remove a player from a game resolves normally.

Any effect that would remove a planeswalker from the battlefield or would remove their controller from the game instead ends the player planeswalker’s status as a player planeswalker and they become a player again.

Whenever a player planeswalker would leave the battlefield, they choose the nearest unoccupied plane and travel there. If several planes are equally close, they choose one. If a player stops being a player planeswalker because their controller died, they stay on the same plane and take control of it.

If a player is summoned by another player in their controller’s area of effect, both copies of that player planeswalker will be put into the graveyard as a state-based effect and that player will be able to choose which player from whose location they wish to move into the closest unoccupied plane.

If a player is summoned by another player not in their controller’s area of effect, they move to the new plane as if they were just summoned and abandon their previous controller.

Optional Optional Rules:

         At the beginning of their first main phase after being summoned, a planeswalker player adds mana to their mana pool equal to their mana cost.

         If a player ever mentions a converted mana cost for themselves as a planeswalker, that is their mana cost for the rest of the game.