Laurent - added rampage to the parser (see example from diverse set) could be extended...I've let the ability "rampage" (in fact rampage 1) but older set (esp. legends, would need an update later on).

projects/mtg/bin/Res/sets/MIR/_cards.dat

@@ -451,6 +451,18 @@ toughness=1
 rarity=U
 [/card]
 [card]
+text=Whenever Jungle Wurm becomes blocked, it gets -1/-1 until end of turn for each creature blocking it beyond the first.
+id=3393
+auto=rampage(-1/-1,1)
+name=Jungle Wurm
+rarity=C
+type=Creature
+mana={3}{G}{G}
+power=5
+subtype=Wurm
+toughness=5
+[/card]
+[card]
 text=Protection from blue
 id=3394 
 name=Karoo Meerkat
@@ -819,6 +831,18 @@ toughness=3
 rarity=C
 [/card]
 [card]
+text=Flying; trample; rampage 4 (Whenever this creature becomes blocked, it gets +4/+4 until end of turn for each creature blocking it beyond the first.)
+id=3268
+auto=rampage(4/4,1)
+name=Teeka's Dragon
+rarity=R
+type=Artifact Creature
+mana={9}
+power=5
+subtype=Dragon
+toughness=5
+[/card]
+[card]
 text={2}{T}: Telim'Tor's Darts deals 1 damage to target player. 
 id=3269 
 name=Telim'Tor's Darts
@@ -1072,7 +1096,7 @@ id=3252
 name=Horrible Hordes
 type=Artifact Creature
 subtype=Spirit
-abilities=rampage
+auto=rampage(1/1,1)
 mana={3}
 power=2
 toughness=2