- Added "loseSubtypesOf(type)" ability. For example, loseSubtypesOf(land) means "target loses all its land subtypes"

- Added Evil Presence, as an example of the new keywords loseabilities and losesubtypes. It's quite experimental but I added 3 tests that cover the basics. Please report if you find bugs.
- moved the "lands produce mana" rules outside of the primitives, and into the external rules. This was a necessary step to create cards such as Evil Presence. 
- real support for subtypes. Needs some more testing, but there are now functions in Subtypes.cpp to know if a given subtype is a creature subtype, or a land subtype, etc...
- minor refactor of MTGDeck.cpp

Notes:
- I checked that the AI can still use lands
- This change has a bad impact on primitives loading performance (thanks Wil for the loading time output). This is probably due to suboptimal algorithms and data structures for subtypes. If the impact is strong on lowend devices, I can probably optimize a bit (the map subtypesOf could be changed into a vector with some work)
- The test suite passes, added 3 tests for evil presence.

projects/mtg/bin/Res/sets/primitives/mtg.txt

@@ -4269,8 +4269,6 @@ type=Land
 [/card]
 [card]
 name=Badlands
-auto={T}:Add {R}
-auto={T}:Add {B}
 type=Land
 subtype=Swamp Mountain
 [/card]
@@ -5252,8 +5250,6 @@ toughness=1
 [/card]
 [card]
 name=Bayou
-auto={T}:Add {B}
-auto={T}:Add {G}
 type=Land
 subtype=Swamp Forest
 [/card]
@@ -6678,8 +6674,6 @@ toughness=2
 name=Blood Crypt
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {B}
-auto={T}:Add {R}
 text=({T}: Add {B} or {R} to your mana pool.) -- As Blood Crypt enters the battlefield, you may pay 2 life. If you don't, Blood Crypt enters the battlefield tapped.
 type=Land
 subtype=Swamp Mountain
@@ -8203,8 +8197,6 @@ type=Enchantment
 name=Breeding Pool
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {G}
-auto={T}:Add {U}
 text=({T}: Add {G} or {U} to your mana pool.) -- As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, Breeding Pool enters the battlefield tapped.
 type=Land
 subtype=Forest Island
@@ -17855,10 +17847,9 @@ type=Sorcery
 [/card]
 [card]
 name=Dryad Arbor
-auto={T}:add{G}
 text=(Dryad Arbor isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G} to your mana pool.") -- Dryad Arbor is green.
 color=green
-type=Land Creature
+type=Creature Land
 subtype=Forest Dryad
 power=1
 toughness=1
@@ -20461,6 +20452,17 @@ power=6
 toughness=3
 [/card]
 [card]
+name=Evil Presence
+text=Enchant land -- Enchanted land is a Swamp.
+target=land
+auto=loseabilities
+auto=losesubtypesof(land)
+auto=transforms((swamp,))
+mana={B}
+type=Enchantment
+subtype=Aura
+[/card]
+[card]
 name=Evincar's Justice
 auto=damage:2 all(creature,player)
 buyback={2}{B}{B}{3}
@@ -23529,7 +23531,6 @@ subtype=Aura
 [/card]
 [card]
 name=Forest
-auto={T}: Add {G}
 text=G
 type=Basic Land
 subtype=Forest
@@ -26788,8 +26789,6 @@ toughness=4
 name=Godless Shrine
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {W}
-auto={T}:Add {B}
 text=({T}: Add {W} or {B} to your mana pool.) -- As Godless Shrine enters the battlefield, you may pay 2 life. If you don't, Godless Shrine enters the battlefield tapped.
 type=Land
 subtype=Plains Swamp
@@ -28498,8 +28497,6 @@ toughness=3
 name=Hallowed Fountain
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {W}
-auto={T}:Add {U}
 text=({T}: Add {W} or {U} to your mana pool.) -- As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, Hallowed Fountain enters the battlefield tapped.
 type=Land
 subtype=Plains Island
@@ -32457,7 +32454,6 @@ toughness=1
 [/card]
 [card]
 name=Island
-auto={T}: Add {U}
 text=U
 type=Basic Land
 subtype=Island
@@ -36645,7 +36641,6 @@ toughness=5
 [card]
 name=Leechridden Swamp
 auto=tap
-auto={T}:Add {B}
 auto=aslongas(*[black]|myBattlefield) {B}{T}:life:-1 opponent >1
 text=({T}: Add {B} to your mana pool.) -- Leechridden Swamp enters the battlefield tapped. -- {B}, {T}: Each opponent loses 1 life. Activate this ability only if you control two or more black permanents.
 type=Land
@@ -42130,7 +42125,6 @@ toughness=2
 [/card]
 [card]
 name=Mountain
-auto={T}: Add {R}
 text=R
 type=Basic Land
 subtype=Mountain
@@ -42437,7 +42431,6 @@ toughness=4
 name=Murmuring Bosk
 auto=tap
 auto=aslongas(treefolk|myhand) untap
-auto={T}:Add{G}
 auto={T}:Add{W} && damage:1 controller
 auto={T}:Add{B} && damage:1 controller
 text=({T}: Add {G} to your mana pool.) -- As Murmuring Bosk enters the battlefield, you may reveal a Treefolk card from your hand. If you don't, Murmuring Bosk enters the battlefield tapped. -- {T}: Add {W} or {B} to your mana pool. Murmuring Bosk deals 1 damage to you.
@@ -45853,8 +45846,6 @@ type=Enchantment
 name=Overgrown Tomb
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {B}
-auto={T}:Add {G}
 text=({T}: Add {B} or {G} to your mana pool.) -- As Overgrown Tomb enters the battlefield, you may pay 2 life. If you don't, Overgrown Tomb enters the battlefield tapped.
 type=Land
 subtype=Swamp Forest
@@ -48100,7 +48091,6 @@ toughness=1
 [/card]
 [card]
 name=Plains
-auto={T}: Add {W}
 text=W
 type=Basic Land
 subtype=Plains
@@ -48185,8 +48175,6 @@ toughness=1
 [/card]
 [card]
 name=Plateau
-auto={T}:Add {R}
-auto={T}:Add {W}
 type=Land
 subtype=Mountain Plains
 [/card]
@@ -54017,8 +54005,6 @@ toughness=3
 name=Sacred Foundry
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {R}
-auto={T}:Add {W}
 text=({T}: Add {R} or {W} to your mana pool.) -- As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, Sacred Foundry enters the battlefield tapped.
 type=Land
 subtype=Mountain Plains
@@ -54662,7 +54648,6 @@ type=Land
 [card]
 name=Sapseep Forest
 auto=tap
-auto={T}:Add {G}
 auto=aslongas(*[green]|myBattlefield) {G}{T}:life:1 controller >1
 text=({T}: Add {G} to your mana pool.) -- Sapseep Forest enters the battlefield tapped. -- {G}, {T}: You gain 1 life. Activate this ability only if you control two or more green permanents.
 type=Land
@@ -54844,8 +54829,6 @@ type=Sorcery
 [/card]
 [card]
 name=Savannah
-auto={T}:Add {W}
-auto={T}:Add {G}
 type=Land
 subtype=Forest Plains
 [/card]
@@ -55540,8 +55523,6 @@ toughness=3
 [/card]
 [card]
 name=Scrubland
-auto={T}:Add {W}
-auto={T}:Add {B}
 type=Land
 subtype=Plains Swamp
 [/card]
@@ -60057,35 +60038,30 @@ toughness=1
 [/card]
 [card]
 name=Snow-Covered Forest
-auto={T}:Add {G}
 text=G
 type=Basic Snow Land
 subtype=Forest
 [/card]
 [card]
 name=Snow-Covered Island
-auto={T}:Add {U}
 text=U
 type=Basic Snow Land
 subtype=Island
 [/card]
 [card]
 name=Snow-Covered Mountain
-auto={T}:Add {R}
 text=R
 type=Basic Snow Land
 subtype=Mountain
 [/card]
 [card]
 name=Snow-Covered Plains
-auto={T}:Add {W}
 text=W
 type=Basic Snow Land
 subtype=Plains
 [/card]
 [card]
 name=Snow-Covered Swamp
-auto={T}:Add {B}
 text=B
 type=Basic Snow Land
 subtype=Swamp
@@ -62691,8 +62667,6 @@ toughness=5
 name=Steam Vents
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {U}
-auto={T}:Add {R}
 text=({T}: Add {U} or {R} to your mana pool.) -- As Steam Vents enters the battlefield, you may pay 2 life. If you don't, Steam Vents enters the battlefield tapped.
 type=Land
 subtype=Island Mountain
@@ -62995,8 +62969,6 @@ toughness=3
 name=Stomping Ground
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {R}
-auto={T}:Add {G}
 text=({T}: Add {R} or {G} to your mana pool.) -- As Stomping Ground enters the battlefield, you may pay 2 life. If you don't, Stomping Ground enters the battlefield tapped.
 type=Land
 subtype=Mountain Forest
@@ -64418,7 +64390,6 @@ subtype=Arcane
 [/card]
 [card]
 name=Swamp
-auto={T}: Add {B}
 text=B
 type=Basic Land
 subtype=Swamp
@@ -64851,8 +64822,6 @@ toughness=5
 [/card]
 [card]
 name=Taiga
-auto={T}:Add {G}
-auto={T}:Add {R}
 type=Land
 subtype=Mountain Forest
 [/card]
@@ -65855,8 +65824,6 @@ toughness=2
 name=Temple Garden
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {G}
-auto={T}:Add {W}
 text=({T}: Add {G} or {W} to your mana pool.) -- As Temple Garden enters the battlefield, you may pay 2 life. If you don't, Temple Garden enters the battlefield tapped.
 type=Land
 subtype=Forest Plains
@@ -69106,8 +69073,6 @@ toughness=3
 [/card]
 [card]
 name=Tropical Island
-auto={T}:Add {G}
-auto={T}:Add {U}
 type=Land
 subtype=Forest Island
 [/card]
@@ -69258,8 +69223,6 @@ type=Artifact
 [/card]
 [card]
 name=Tundra
-auto={T}:Add {U}
-auto={T}:Add {W}
 type=Land
 subtype=Plains Island
 [/card]
@@ -69690,8 +69653,6 @@ type=Land
 [/card]
 [card]
 name=Underground Sea
-auto={T}:Add {B}
-auto={T}:Add {U}
 type=Land
 subtype=Island Swamp
 [/card]
@@ -72406,8 +72367,6 @@ type=Sorcery
 [/card]
 [card]
 name=Volcanic Island
-auto={T}:Add {U}
-auto={T}:Add {R}
 type=Land
 subtype=Island Mountain
 [/card]
@@ -73773,8 +73732,6 @@ type=Land
 name=Watery Grave
 auto=tap
 auto=may untap && life:-2 controller
-auto={T}:Add {U}
-auto={T}:Add {B}
 text=({T}: Add {U} or {B} to your mana pool.) -- As Watery Grave enters the battlefield, you may pay 2 life. If you don't, Watery Grave enters the battlefield tapped.
 type=Land
 subtype=Island Swamp

projects/mtg/bin/Res/sets/primitives/unsupported.txt

@@ -6574,18 +6574,6 @@ power=2
 toughness=2
 [/card]
 [card]
-#Need a way for the target to lose its land subtypes.
-#Need to move the {T}:Add{X} rules for basic lands outside of the cards and into the rules <-- easy?
-name=Evil Presence
-text=Enchant land -- Enchanted land is a Swamp.
-target=land
-auto=loseabilities
-auto=transforms((swamp,))
-mana={B}
-type=Enchantment
-subtype=Aura
-[/card]
-[card]
 name=Excavation
 text={1}, Sacrifice a land: Draw a card. Any player may activate this ability.
 mana={1}{U}