diff --git a/fftcg/__init__.py b/fftcg/__init__.py
index 51f0407..c148d3c 100644
--- a/fftcg/__init__.py
+++ b/fftcg/__init__.py
@@ -2,5 +2,6 @@ from .book import Book
 from .card import Card
 from .carddb import CardDB
 from .opus import Opus
+from .ttsdeck import TTSDeck
 
-__all__ = ["Book", "Opus", "Card", "CardDB"]
+__all__ = ["Book", "Card", "CardDB", "Opus", "TTSDeck"]
diff --git a/main.py b/main.py
index 27ea821..30c9ee5 100755
--- a/main.py
+++ b/main.py
@@ -6,41 +6,10 @@ import os
 import fftcg
 
 
-def main() -> None:
-    # set up CLI
-    parser = argparse.ArgumentParser(
-        description="Imports FFTCG cards for TT-Sim.",
-    )
-
-    parser.add_argument(
-        "opus_id",
-        default="promo",
-        metavar="Opus_ID",
-        nargs="?",
-        help="the Opus to import",
-    )
-
-    parser.add_argument(
-        "-n", "--num_threads",
-        type=int,
-        default=20,
-        metavar="COUNT",
-        help="maximum number of concurrent requests",
-    )
-
-    args = parser.parse_args()
-
-    # set up logging
-    logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(processName)s %(message)s")
-
-    # output directory
-    if not os.path.exists("out"):
-        os.mkdir("out")
-    os.chdir("out")
-
-    # main program
+def opus_decks(args: argparse.Namespace) -> list[fftcg.TTSDeck]:
+    # import an opus
     opus = fftcg.Opus(args.opus_id)
-    book = fftcg.Book(opus, "eg", args.num_threads)
+    book = fftcg.Book(opus, "eg", args.num_requests)
     book.save()
 
     # load the current carddb
@@ -48,7 +17,90 @@ def main() -> None:
     carddb.load()
 
     # create elemental decks for opus
-    for deck in opus.elemental_decks:
+    return opus.elemental_decks
+
+
+def ffdecks_deck(args: argparse.Namespace) -> list[fftcg.TTSDeck]:
+    # load the current carddb
+    carddb = fftcg.CardDB.get()
+    carddb.load()
+
+    # import a deck
+    return [fftcg.TTSDeck.from_ffdecks_deck(args.deck_id)]
+
+
+def main() -> None:
+    # set up CLI
+
+    # main parser
+    parser = argparse.ArgumentParser(
+        prog="fftcgtool",
+        description="Imports FFTCG cards for TT-Sim.",
+    )
+
+    subparsers = parser.add_subparsers(
+        description="Import either an Opus to extend the mod, or import a deck to play right away.",
+        dest="subcommand",
+        help="valid subcommands",
+        required=True,
+    )
+
+    # "opus" subcommand
+    opus_parser = subparsers.add_parser(
+        "opus",
+        description="Imports an Opus from the square API and creates its elemental decks as JSON files.",
+    )
+
+    opus_parser.set_defaults(
+        func=opus_decks
+    )
+
+    opus_parser.add_argument(
+        "opus_id",
+        type=str,
+        metavar="Opus_ID",
+        help="the Opus to import",
+    )
+
+    opus_parser.add_argument(
+        "-n", "--num_requests",
+        type=int,
+        default=20,
+        metavar="COUNT",
+        help="maximum number of concurrent requests",
+    )
+
+    # "deck" subcommand
+    deck_parser = subparsers.add_parser(
+        "deck",
+        description="Imports a Deck from the ffdecks.com API and creates it as a JSON file.",
+    )
+
+    deck_parser.set_defaults(
+        func=ffdecks_deck
+    )
+
+    deck_parser.add_argument(
+        "deck_id",
+        type=str,
+        metavar="Deck_ID",
+        help="the Deck to import",
+    )
+
+    # set up logging
+    logging.basicConfig(
+        level=logging.INFO,
+        format="%(levelname)s: %(processName)s %(message)s",
+    )
+
+    # output directory
+    if not os.path.exists("out"):
+        os.mkdir("out")
+    os.chdir("out")
+
+    # call function based on args
+    args = parser.parse_args()
+    for deck in args.func(args):
         deck.save()
 
     # bye