Spend as other mana: The easiest way would probably be to intercept mana costs before they are paid and replace them with different mana costs (so it only changes what you're asked to pay).
Effects are:
Celestial Dawn: You may spend white mana as though it were mana of any color. You may spend other mana only as though it were colorless mana.
False Dawn: Until end of turn, you may spend white mana as though it were mana of any color.
Mycosynth Lattice: Players may spend mana as though it were mana of any color.
North Star: For one spell this turn, you may spend mana as though it were mana of any color to pay that spell's mana cost.
Quicksilver Elemental: You may spend blue mana as though it were mana of any color to pay the activation costs of
Quicksilver Elemental's abilities.
Sunglasses of Urza: You may spend white mana as though it were red mana.
First of all, there's the question of how these effects interact with each other. My best guess is that you can imagine a 6x6 (5 colors + colorless) table of rules: Can I pay mana
X when the cost calls for mana Y?
Each of these effects would then modify the rules in timestamp order.
The standard table looks like this:
- Code: Select all
| W U B R G 1
-+------------
W| X O O O O X
U| O X O O O X
B| O O X O O X
R| O O O X O X
G| O O O O X X
1| O O O O O X
Celestial Dawn modifies the table to look like this:
- Code: Select all
| W U B R G 1
-+------------
W| X X X X X X
U| O O O O O X
B| O O O O O X
R| O O O O O X
G| O O O O O X
1| O O O O O X
The
False Dawn table looks like this:
- Code: Select all
| W U B R G 1
-+------------
W| X X X X X X
U| O X O O O X
B| O O X O O X
R| O O O X O X
G| O O O O X X
1| O O O O O X
The table for
Mycosynth Lattice and
North Star looks like this (I presume
North Star would work like, say,
Omniscience, in that clicking on the spells gives you a choice to play it through
North Star effect which would be used up by this -- and of course,
North Star would only affect the mana cost itself and not any extra costs):
- Code: Select all
| W U B R G 1
-+------------
W| X X X X X X
U| X X X X X X
B| X X X X X X
R| X X X X X X
G| X X X X X X
1| X X X X X X
For
Quicksilver Elemental, the table is similar to
False Dawn:
- Code: Select all
| W U B R G 1
-+------------
W| X O O O O X
U| X X X X X X
B| O O X O O X
R| O O O X O X
G| O O O O X X
1| O O O O O X
And finally, for
Sunglasses of Urza it looks like this:
- Code: Select all
| W U B R G 1
-+------------
W| X O O X O X
U| O X O O O X
B| O O X O O X
R| O O O X O X
G| O O O O X X
1| O O O O O X
Now, a rules question I'm not sure about is: what if I have two Celestial Dawns and one of them is sleighted, say, black? The table for this modified
Celestial Dawn would look like this:
- Code: Select all
| W U B R G 1
-+------------
W| O O O O O X
U| O O O O O X
B| X X X X X X
R| O O O O O X
G| O O O O O X
1| O O O O O X
Will it go by timestamp and the later effect wins? Or will the tables combine in some nontrivial way? Celetial Dawn is the only effect that actually REMOVES entries from the table, all the other only add more.
If we go by timestamp order, let's look at
Celestial Dawn +
Quicksilver Elemental situation:
Celestial Dawn first would look like this:
- Code: Select all
| W U B R G 1
-+------------
W| X X X X X X
U| X X X X X X
B| O O O O O X
R| O O O O O X
G| O O O O O X
1| O O O O O X
And
Quicksilver Elemental first would look just like
Celestial Dawn alone since the extra uses of blue mana
Quicksilver Elemental allows would be wiped by later
Celestial Dawn.
So: mana display. Once you have a valid table, mana display is simple.
1. Generic mana symbol stays generic -- none of these effects change the last column of the table.
2. For colored mana symbol, look its column in table - if there's only one entry, it will be displayed as that mana symbol, if there are multiple entries, it will be displayed as hybrid symbol (with more than 2 choices, potentially), and if all entries are true (which happens with
Mycosynth Lattice), it will be displayed as generic mana symbol (and added to other generic symbols).
3. For hybrid mana symbol, look the two columns, otherwise it works identically to option 2.
4. For 2/C or Phyrexian symbols, look the colored column and add the 2 or P option to the resulting symbol.
For example, a hybrid mana {R/G} would become
under
Celestial Dawn, {R/G/W} under False Darn, {U/R/G} under
Quicksilver Elemental,
under
Mycosynth Lattice and {R/G/W} under
Sunglasses of Urza.
This way, every symbol of the cost to be paid will be converted to a symbol depicting mana you are actually allowed to pay for it. However, additional symbols would have to be introduced.
1. A symbol for colorless mana -- if you have
Mycosynth Lattice and then
Celestial Dawn enters the battlefield, it will wipe uses of colored mana, but not the enhanced use of colorless mana. So a
symbol would be payable by white or colorless mana and would have to be displayed as a hybrid cost {W/C}.
2. I suspect there might be a way, eventually, to make a symbol completely unpayable. This should be signified by {!} and a cost including such symbol couldn't be paid.
Posted: 10 Aug 2013, 16:12
And