tests:

-----------
Mortician_Beetle.txt
Savra_Queen_of_the_Golgari.txt

added:
-----------
Saprazzan Breaker
Savra, Queen of the Golgari

borderline:
-----------
Ogre Marauder

crappy:
-----------
Barbarian Bully
Skullscorch

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

@@ -149,6 +149,16 @@ power=1
 toughness=1
 [/card]
 [card]
+name=Ogre Marauder
+text=Whenever Ogre Marauder attacks, it gains "Ogre Marauder can't be blocked" until end of turn unless defending player sacrifices a creature.
+auto=@combat(attacking) source(this):ability$!name(choose one) if type(creature|mybattlefield)~morethan~0 then choice sacrifice notatarget(creature|mybattlefield) _ choice all(mystored) unblockable ueot!$ opponent
+mana={1}{B}{B}
+type=Creature
+subtype=Ogre Warrior
+power=3
+toughness=1
+[/card]
+[card]
 name=Rakdos Augermage
 abilities=first strike
 auto={T}:name(target opponent) target(opponent) donothing && all(this) transforms((,newability[ability$!name(discard) reject notatarget(*|opponenthand)!$ targetedplayer && ability$!name(discard) reject notatarget(*|opponenthand)!$ controller])) assorcery