added:

Mangara's Equity
Maralen of the Mornsong
Mercenary Informer
Mind Swords
Monkey Cage
Myr Battlesphere
Mystic Snake
Necropolis

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

@@ -51643,6 +51643,15 @@ power=1
 toughness=1
 [/card]
 [card]
+name=Mangara's Equity
+auto=upcost[{1}{W}] sacrifice
+auto=choice name(choose black) transforms((,newability[@damaged(controller) from(creature[black]|*):damage:thatmuch all(trigger[from])],newability[@damaged(creature[white]|mybattlefield) from(creature[black]|*):damage:thatmuch all(trigger[from])])) forever
+auto=choice name(choose red) transforms((,newability[@damaged(controller) from(creature[red]|*):damage:thatmuch all(trigger[from])],newability[@damaged(creature[white]|mybattlefield) from(creature[red]|*):damage:thatmuch all(trigger[from])])) forever
+text=As Mangara's Equity enters the battlefield, choose black or red. -- At the beginning of your upkeep, sacrifice Mangara's Equity unless you pay {1}{W}. -- Whenever a creature of the chosen color deals damage to you or a white creature you control, Mangara's Equity deals that much damage to that creature.
+mana={1}{W}{W}
+type=Enchantment
+[/card]
+[card]
 name=Maniacal Rage
 target=creature
 auto=2/2
@@ -51744,6 +51753,19 @@ type=Enchantment
 subtype=Aura
 [/card]
 [card]
+name=Maralen of the Mornsong
+auto=replacedraw 0/0
+auto=opponentreplacedraw 0/0
+auto=@each my draw:life:-3 && ability$!choice name(search a card) notatarget(*|mylibrary) moveto(ownerhand) && shuffle!$ controller
+auto=@each opponent draw:life:-3 opponent && ability$!choice name(search a card) notatarget(*|mylibrary) moveto(ownerhand) && shuffle!$ opponent
+text=Players can't draw cards. -- At the beginning of each player's draw step, that player loses 3 life, searches his or her library for a card, puts it into his or her hand, then shuffles his or her library.
+mana={1}{B}{B}
+type=Legendary Creature
+subtype=Elf Wizard
+power=2
+toughness=3
+[/card]
+[card]
 name=Marauding Knight
 abilities=protection from white
 auto=foreach(Plains|opponentBattlefield) 1/1
@@ -52970,6 +52992,17 @@ mana={2}{R}
 type=Instant
 [/card]
 [card]
+name=Mercenary Informer
+auto=cantbetargetof(*[black])
+auto={2}{W}:bottomoflibrary
+text=Mercenary Informer can't be the target of black spells or abilities from black sources. -- {2}{W}: Put target Mercenary on the bottom of its owner's library.
+mana={2}{W}
+type=Creature
+subtype=Human Rebel Mercenary
+power=2
+toughness=1
+[/card]
+[card]
 name=Mercenary Knight
 auto=aslongas(creature|myhand) reject target(creature|myhand) oneshot
 auto=moveTo(graveyard) notatarget(this|myBattlefield)
@@ -53826,6 +53859,15 @@ mana={2}
 type=Artifact
 [/card]
 [card]
+name=Mind Swords
+other={S(creature|myBattlefield)}
+otherrestriction=type(swamp|mybattlefield)~morethan~0
+auto=ability$!moveto(exile) notatarget(<2>*|myhand)!$ controller && ability$!moveto(exile) notatarget(<2>*|myhand)!$ opponent
+text=If you control a Swamp, you may sacrifice a creature rather than pay Mind Swords's mana cost. -- Each player exiles two cards from his or her hand.
+mana={1}{B}
+type=Sorcery
+[/card]
+[card]
 name=Mind Twist
 target=player
 auto=discard:X
@@ -55233,6 +55275,29 @@ power=1
 toughness=1
 [/card]
 [card]
+name=Monkey Cage
+auto=@movedTo(creature[manacost=0]|battlefield) once:sacrifice all(this) && loseabilities all(this)
+auto=@movedTo(creature[manacost=1]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)
+auto=@movedTo(creature[manacost=2]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*2
+auto=@movedTo(creature[manacost=3]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*3
+auto=@movedTo(creature[manacost=4]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*4
+auto=@movedTo(creature[manacost=5]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*5
+auto=@movedTo(creature[manacost=6]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*6
+auto=@movedTo(creature[manacost=7]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*7
+auto=@movedTo(creature[manacost=8]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*8
+auto=@movedTo(creature[manacost=9]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*9
+auto=@movedTo(creature[manacost=10]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*10
+auto=@movedTo(creature[manacost=11]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*11
+auto=@movedTo(creature[manacost=12]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*12
+auto=@movedTo(creature[manacost=13]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*13
+auto=@movedTo(creature[manacost=14]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*14
+auto=@movedTo(creature[manacost=15]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*15
+auto=@movedTo(creature[manacost=16]|battlefield) once:sacrifice all(this) && loseabilities all(this) && token(Ape,Creature Ape,2/2,green)*16
+text=When a creature enters the battlefield, sacrifice Monkey Cage and put X 2/2 green Ape creature tokens onto the battlefield, where X is that creature's converted mana cost.
+mana={5}
+type=Artifact
+[/card]
+[card]
 name=Mons's Goblin Raiders
 mana={R}
 type=Creature
@@ -56451,6 +56516,17 @@ power=1
 toughness=1
 [/card]
 [card]
+name=Myr Battlesphere
+auto=token(Myr,Artifact Creature Myr,1/1)*4
+auto=@combat(attacking) source(this) restriction{type(myr[-tapped]|mybattlefield)~morethan~0}:may notatarget(<anyamount>myr[-tapped]|mybattlefield) tap && all(this) 1/0 ueot && damage:1 opponent
+text=When Myr Battlesphere enters the battlefield, put four 1/1 colorless Myr artifact creature tokens onto the battlefield. Whenever Myr Battlesphere attacks, you may tap X untapped Myr you control. If you do, Myr Battlesphere gets +X/+0 until end of turn and deals X damage to defending player.
+mana={7}
+type=Artifact Creature
+subtype=Myr Construct
+power=4
+toughness=7
+[/card]
+[card]
 name=Myr Enforcer
 abilities=affinityartifacts
 text=Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
@@ -56734,6 +56810,17 @@ mana={3}{U}
 type=Sorcery
 [/card]
 [card]
+name=Mystic Snake
+abilities=flash
+auto=if type(*|stack)~morethan~0 then fizzle target(*|stack)
+text=Flash (You may cast this spell any time you could cast an instant.) -- When Mystic Snake enters the battlefield, counter target spell.
+mana={1}{G}{U}{U}
+type=Creature
+subtype=Snake
+power=2
+toughness=2
+[/card]
+[card]
 name=Mystic Visionary
 auto=aslongas(*|mygraveyard) flying >6
 text=Threshold - Mystic Visionary has flying as long as seven or more cards are in your graveyard.
@@ -57428,6 +57515,17 @@ power=1
 toughness=1
 [/card]
 [card]
+name=Necropolis
+abilities=defender
+auto={E(creature|mygraveyard)}:counter(0/1,storedmanacost)
+text=Defender (This creature can't attack.) -- Exile a creature card from your graveyard: Put X +0/+1 counters on Necropolis, where X is the exiled card's converted mana cost.
+mana={5}
+type=Artifact Creature
+subtype=Wall
+power=0
+toughness=1
+[/card]
+[card]
 name=Necropolis Regent
 auto=lord(creature|mybattlefield) transforms((,newability[@combatdamaged(player) from(this):dynamicability<!thatmuchcountersoneone!>]))
 abilities=flying