Added 51 successfully tested cards based on rev1757.

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

@@ -15,6 +15,18 @@ type=Land
 subtype=Snow
 [/card]
 [card]
+text={U}, {T}: Target snow land becomes a 2/2 blue Elemental creature with flying. It's still a land.
+id=121175
+name=Balduvian Frostwaker
+rarity=U 
+mana={2}{U}
+type=Creature
+subtype=Human Wizard
+auto={U}{T}:target(land[snow]) becomes(Creature Elemental,2/2,flying,blue)
+power=1
+toughness=1 
+[/card]
+[card]
 text=Target attacking creature gets +X/+0 until end of turn.   Draw a card at the beginning of the next turn's upkeep.
 id=121248
 target=creature[attacking]