diff --git a/gameloop.py b/gameloop.py
index ecf34cf..76d8c21 100644
--- a/gameloop.py
+++ b/gameloop.py
@@ -5,7 +5,6 @@ from collections import namedtuple
 import cardcast_api
 
 # TODO: rando
-# TODO: $0 support
 # TODO: collapse several _ in a row into one
 # TODO: keep track of where cards come from purge from hand when deck remove
 
@@ -520,11 +519,45 @@ def game(send, notice, get_event):
 		notice(nick, cards)
 
 	def combine_cards(call, responses):
-		combined = [sanitize(call[0])]
+		def handle_call_part(call_part):
+			nonlocal responses
+
+			r = []
+			after_dollar = False
+			for char in call_part:
+				if after_dollar and ord('0') <= ord(char) <= ord('9'):
+					# Handle $0 .. $9
+					# Hopefully we won't run into more backreferences
+					# in one card
+					index = int(char)
+
+					if 0 <= index < len(responses):
+						r.append(responses[index])
+					else:
+						# Not valid backreference, copy verbatim
+						r.append('$' + char)
+
+					after_dollar = False
+
+				elif after_dollar:
+					# Wasn't a backreference, copy verbatim
+					r.append('$' + char)
+
+					after_dollar = False
+
+				elif char == '$':
+					after_dollar = True
+
+				else:
+					r.append(char)
+
+			return sanitize(''.join(r))
+
+		combined = [handle_call_part(call[0])]
 
 		for i in range(len(call) - 1):
 			combined.append('[' + sanitize(responses[i]) + ']')
-			combined.append(sanitize(call[i + 1]))
+			combined.append(handle_call_part(call[i + 1]))
 
 		return ''.join(combined)