diff --git a/scrython/cards/cards_object.py b/scrython/cards/cards_object.py
index 3174569..96a9022 100644
--- a/scrython/cards/cards_object.py
+++ b/scrython/cards/cards_object.py
@@ -420,15 +420,15 @@ class CardsObject(FoundationObject):
 
         return self.scryfallJson['frame']
 
-    def frame_effect(self):
+    def frame_effects(self):
         """The card's frame effect, if any. (miracle, nyxtouched, etc.)
         
         Returns:
-            string: The card's frame effect.
+            list: The card's frame effects.
         """
-        super(CardsObject, self)._checkForKey('frame_effect')
+        super(CardsObject, self)._checkForKey('frame_effects')
 
-        return self.scryfallJson['frame_effect']
+        return self.scryfallJson['frame_effects']
 
     def full_art(self):
         """Returns True if the card is considered full art
@@ -472,13 +472,13 @@ class CardsObject(FoundationObject):
         Returns:
             float: The prices as a float
         """
-        modes = ['usd', 'eur', 'tix']
+        modes = ['usd', 'usd_foil', 'eur', 'tix']
         if mode not in modes:
             raise KeyError("{} is not a key.".format(mode))
 
-        super(CardsObject, self)._checkForKey(mode)
+        super(CardsObject, self)._checkForKey('prices', mode)
 
-        return self.scryfallJson[mode]
+        return self.scryfallJson['prices'][mode]
 
     def related_uris(self):
         """A dictionary of related websites for this card
diff --git a/scrython/foundation.py b/scrython/foundation.py
index 844224c..93891e8 100644
--- a/scrython/foundation.py
+++ b/scrython/foundation.py
@@ -37,7 +37,7 @@ class FoundationObject(object):
         if self.scryfallJson['object'] == 'error':
             raise ScryfallError(self.scryfallJson, self.scryfallJson['details'])
 
-    def _checkForKey(self, key):
+    def _checkForKey(self, key, nested_key=None):
         """Checks for a key in the scryfallJson object.
         This function should be considered private, and
         should not be accessed in production.
@@ -51,6 +51,11 @@ class FoundationObject(object):
         if not key in self.scryfallJson:
             raise KeyError('This card has no key \'{}\''.format(key))
 
+        if nested_key:
+            if not nested_key in self.scryfallJson[key]:
+                raise KeyError('This card has no key \'{}.{}\''.format(key, nested_key))
+
+
     def _checkForTupleKey(self, parent, num, key):
         """Checks for a key of an object in an array.
         This function should be considered private, and
diff --git a/unittests/TestCards.py b/unittests/TestCards.py
index daeff35..bc163f4 100644
--- a/unittests/TestCards.py
+++ b/unittests/TestCards.py
@@ -240,8 +240,8 @@ class TestSearch(unittest.TestCase):
     def test_tcgplayer_id(self):
         self.assertIsInstance(non_online_card.tcgplayer_id(), int)
 
-    def test_frame_effect(self):
-        self.assertIsInstance(transform.frame_effect(), str)
+    def test_frame_effects(self):
+        self.assertIsInstance(transform.frame_effects(), list)
 
     def test_games(self):
         self.assertIsInstance(non_online_card.games(), list)