Added 4 cards based on revision4692.

Duct Crawler
Screeching Griffin
Shrewd Hatchling
Spin Engine

Optimized the code of 11 cards based on the same revision:

Boldwyr Intimidator
Bower Passage
Brassclaw Orcs
Gibbering Hyenas
Goblin Mutant
Hunted Ghoul
Ironclaw Buzzardiers
Ironclaw Orcs
Orcish Veteran
Orgg
Sabertooth Alley Cat

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

@@ -9604,7 +9604,7 @@ toughness=8
 [/card]
 [card]
 name=Boldwyr Intimidator
-auto=lord(warrior) cantbeblockedby(coward)
+auto=lord(coward) cantbeblockerof(warrior)
 auto={R}:transforms((coward)) target(creature) ueot
 auto={2}{R}:transforms((warrior)) target(creature) ueot
 text=Cowards can't block Warriors. -- {R}: Target creature becomes a Coward until end of turn. -- {2}{R}: Target creature becomes a Warrior until end of turn.
@@ -10150,7 +10150,7 @@ toughness=2
 [/card]
 [card]
 name=Bower Passage
-auto=lord(creature|mybattlefield) cantbeblockedby(creature[flying])
+auto=lord(creature[flying]) cantbeblockerof(creature|mybattlefield)
 text=Creatures with flying can't block creatures you control.
 mana={1}{G}
 type=Enchantment
@@ -10408,7 +10408,7 @@ toughness=3
 [/card]
 [card]
 name=Brassclaw Orcs
-auto=lord(creature[power>=2]) cantbeblockedby(brassclaw orcs)
+auto=cantbeblockerof(creature[power>=2])
 text=Brassclaw Orcs can't block creatures with power 2 or greater.
 mana={2}{R}
 type=Creature
@@ -23774,6 +23774,16 @@ mana={G}
 type=Enchantment
 subtype=Aura
 [/card]
+[card]
+name=Duct Crawler
+auto={1}{R}:target(creature) ueot cantbeblockerof(this)
+text={1}{R}: Target creature can't block Duct Crawler this turn.
+mana={R}
+type=Creature
+subtype=Insect
+power=1
+toughness=1
+[/card]
 #emblem ueot removes the effect, the ability acts an observer
 [card]
 name=Due Respect
@@ -33656,7 +33666,7 @@ type=Sorcery
 [/card]
 [card]
 name=Gibbering Hyenas
-auto=lord(creature[black]) cantbeblockedby(gibbering hyenas)
+auto=cantbeblockerof(creature[black])
 text=Gibbering Hyenas can't block black creatures.
 mana={2}{G}
 type=Creature
@@ -34956,7 +34966,7 @@ toughness=1
 name=Goblin Mutant
 abilities=trample
 auto=aslongas(creature[power>=3;-tapped]|opponentBattlefield) cantattack
-auto=lord(creature) cantbeblockedby(goblin mutant[trample])
+auto=cantbeblockerof(creature[power>=3])
 text=Trample -- Goblin Mutant can't attack if defending player controls an untapped creature with power 3 or greater. -- Goblin Mutant can't block creatures with power 3 or greater.
 mana={2}{R}{R}
 type=Creature
@@ -40887,7 +40897,7 @@ toughness=6
 [/card]
 [card]
 name=Hunted Ghoul
-auto=lord(human) cantbeblockedby(hunted ghoul)
+auto=cantbeblockerof(human)
 text=Hunted Ghoul can't block Humans.
 mana={B}
 type=Creature
@@ -43023,7 +43033,7 @@ toughness=2
 [/card]
 [card]
 name=Ironclaw Buzzardiers
-auto=lord(creature[power>=2]|opponentbattlefield) cantbeblockedby(ironclaw buzzardiers)
+auto=cantbeblockerof(creature[power>=2])
 auto={R}:flying
 text=Ironclaw Buzzardiers can't block creatures with power 2 or greater. -- {R}: Ironclaw Buzzardiers gains flying until end of turn.
 mana={2}{R}
@@ -43034,7 +43044,7 @@ toughness=2
 [/card]
 [card]
 name=Ironclaw Orcs
-auto=lord(creature[power>=2]|opponentbattlefield) cantbeblockedby(ironclaw orcs)
+auto=cantbeblockerof(creature[power>=2])
 text=Ironclaw Orcs can't block creatures with power 2 or greater.
 mana={1}{R}
 type=Creature
@@ -60400,7 +60410,7 @@ toughness=1
 [/card]
 [card]
 name=Orcish Veteran
-auto=lord(creature[white;power>=2]) cantbeblockedby(orcish veteran)
+auto=cantbeblockerof(creature[white;power>=2])
 auto={R}:first strike
 text=Orcish Veteran can't block white creatures with power 2 or greater. -- {R}: Orcish Veteran gains first strike until end of turn.
 mana={2}{R}
@@ -60564,8 +60574,8 @@ toughness=1
 [card]
 name=Orgg
 abilities=trample
+auto=cantbeblockerof(creature[white;power>=3])
 auto=aslongas(creature[power>=3;-tapped]|opponentbattlefield]) cantattack
-auto=lord(creature[power>=3]) cantbeblockedby(orgg)
 text=Trample -- Orgg can't attack if defending player controls an untapped creature with power 3 or greater. -- Orgg can't block creatures with power 3 or greater.
 mana={3}{R}{R}
 type=Creature
@@ -64730,8 +64740,8 @@ toughness=1
 [/card]
 [card]
 name=Primeval Force
-auto=aslongas(forest|mybattlefield) choice target(<3>forest|mybattlefield) sacrifice oneshot >2
+auto=aslongas(forest|mybattlefield) choice name(sacrifice forests) target(<3>forest|mybattlefield) sacrifice oneshot >2
-auto=choice sacrifice all(this)
+auto=choice name(sacrifice this) sacrifice all(this)
 text=When Primeval Force enters the battlefield, sacrifice it unless you sacrifice three Forests.
 mana={2}{G}{G}{G}
 type=Creature
@@ -71461,12 +71471,12 @@ toughness=2
 [/card]
 [card]
 name=Sabertooth Alley Cat
-auto={1}{r}:all(this) cantbeblockedby(creature[-defender]) ueot
+abilities=mustattack
+auto={1}{R}:lord(creature[-defender]) ueot cantbeblockerof(this)
 text=Sabertooth Alley Cat attacks each turn if able. -- {1}{R}: Creatures without defender can't block Sabertooth Alley Cat this turn.
 mana={1}{R}{R}
 type=Creature
 subtype=Cat
-abilities=mustattack
 power=2
 toughness=1
 [/card]
@@ -73391,6 +73401,17 @@ power=2
 toughness=2
 [/card]
 [card]
+name=Screeching Griffin
+abilities=flying
+auto={R}:target(creature) ueot cantbeblockerof(this)
+text=Flying -- {R}: Target creature can't block Screeching Griffin this turn.
+mana={3}{W}
+type=Creature
+subtype=Griffin
+power=2
+toughness=2
+[/card]
+[card]
 name=Screeching Skaab
 auto=deplete:2
 text=When Screeching Skaab enters the battlefield, put the top two cards of your library into your graveyard.
@@ -76240,6 +76261,19 @@ mana={1}{R}{S(artifact|mybattlefield)}
 type=Instant
 [/card]
 [card]
+name=Shrewd Hatchling
+auto={UR}:target(creature) ueot cantbeblockerof(this)
+auto=@movedTo(*[red]|mystack):counter(-1/-1,-1)
+auto=@movedTo(*[blue]|mystack):counter(-1/-1,-1)
+auto=counter(-1/-1,4)
+text=Shrewd Hatchling enters the battlefield with four -1/-1 counters on it. -- {(u/r)}: Target creature can't block Shrewd Hatchling this turn. -- Whenever you cast a blue spell, remove a -1/-1 counter from Shrewd Hatchling. -- Whenever you cast a red spell, remove a -1/-1 counter from Shrewd Hatchling.
+mana={3}{UR}
+type=Creature
+subtype=Elemental
+power=6
+toughness=6
+[/card]
+[card]
 name=Shriek of Dread
 target=creature
 auto=fear
@@ -80775,6 +80809,16 @@ mana={2}
 type=Artifact
 [/card]
 [card]
+name=Spin Engine
+auto={R}:target(creature) ueot cantbeblockerof(this)
+text={R}: Target creature can't block Spin Engine this turn.
+mana={3}
+type=Artifact Creature
+subtype=Construct
+power=3
+toughness=1
+[/card]
+[card]
 name=Spinal Embrace
 target=creature|opponentbattlefield
 restriction=during battle

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

@@ -4493,15 +4493,6 @@ mana={4}{G}{G}
 type=Enchantment
 [/card]
 [card]
-name=Duct Crawler
-text={1}{R}: Target creature can't block Duct Crawler this turn.
-mana={R}
-type=Creature
-subtype=Insect
-power=1
-toughness=1
-[/card]
-[card]
 name=Duergar Hedge-Mage
 text=When Duergar Hedge-Mage enters the battlefield, if you control two or more Mountains, you may destroy target artifact. -- When Duergar Hedge-Mage enters the battlefield, if you control two or more Plains, you may destroy target enchantment.
 mana={2}{RW}
@@ -15211,15 +15202,6 @@ type=Enchantment
 subtype=Aura
 [/card]
 [card]
-name=Screeching Griffin
-text=Flying -- {R}: Target creature can't block Screeching Griffin this turn.
-mana={3}{W}
-type=Creature
-subtype=Griffin
-power=2
-toughness=2
-[/card]
-[card]
 name=Scrib Nibblers
 text={T}: Exile the top card of target player's library. If it's a land card, you gain 1 life. -- Landfall - Whenever a land enters the battlefield under your control, you may untap Scrib Nibblers.
 mana={2}{B}
@@ -15798,15 +15780,6 @@ mana={1}{B}
 type=Instant
 [/card]
 [card]
-name=Shrewd Hatchling
-text=Shrewd Hatchling enters the battlefield with four -1/-1 counters on it. -- {(u/r)}: Target creature can't block Shrewd Hatchling this turn. -- Whenever you cast a blue spell, remove a -1/-1 counter from Shrewd Hatchling. -- Whenever you cast a red spell, remove a -1/-1 counter from Shrewd Hatchling.
-mana={3}{UR}
-type=Creature
-subtype=Elemental
-power=6
-toughness=6
-[/card]
-[card]
 name=Shrine of Piercing Vision
 mana={2}
 type=Artifact
@@ -16820,15 +16793,6 @@ power=1
 toughness=1
 [/card]
 [card]
-name=Spin Engine
-text={R}: Target creature can't block Spin Engine this turn.
-mana={3}
-type=Artifact Creature
-subtype=Construct
-power=3
-toughness=1
-[/card]
-[card]
 name=Spin into Myth
 text=Put target creature on top of its owner's library, then fateseal 2. (To fateseal 2, look at the top two cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)
 mana={4}{U}