18 Serious Fun decks, including 5 commander decks, are made forgeable by the new version, 1.6.40:
23.6.2015: Sedris Is Entertaining
4.11.2014: Do You Want to Build a Snowman?; Ruhan Test
17.1.2012: Supper Time
26.4.2011: Rhys the Redeemed (April 2011)
14.9.2010: Rhys the Redeemed (September 2010)
2.2.2010: Kamahl, Fist of Krosa17.7.2007: Aaron D.'s Kitty Pride; Brian B.'s Privileged Rector; Bryce K.'s Nacatl Nacan'tl Lose; Devin L. (not that one)'s Messed Up Pickles; James's Green-Black Kitty-Cat; Jeff C.'s Teferi / Omenreader; John D.'s
Execute Order 66; Josh C.'s Heroes and Felines; Josh M.'s Pride of the Unblockable; Nick A.'s CATS IN DECKS THEY'RE NOT SUPPOSED TO BE; Peter's CAT DECK; Sneaky Selection; Viranga R.'s Nacatl Arbiter Deck
12.6.2007: Sam Delong's Mono-Green Storyteller
11.5.2004: DestructiveDomain.deq
10.6.2003: ItIsInevitable.deq
13.5.2003: UnstableOoze.deq
25.3.2003: Psychic Battle Deck - Paul Martin;
Psychic Battle Deck - Todd Petit
3.12.2002: Psyyyy-chiiiic Baaaaaaattle!
9.7.2002: Protection From You