When you think of Wizards of the Coast and trading card games, you think  Magic: The Gathering (or, if you’re old enough, the days when they printed the  Pokémon trading card game ). That’s probably not going to change any time soon while  Magic grows from strength to strength and crossover to crossover , but that’s not going to stop the publisher from finally trying something new. After much speculation and mystery around a “redacted” preview at this weekend’s upcoming MagicCon in Las Vegas, today Wizards lifted the lid on just what it’ll be about: a brand new trading card game developed by head  Magic designer Mark Rosewater called  Mood Swings . “I originally came up with  Mood Swings in 1998,” Rosewater recently told io9 and other gathered press at a recent briefing over Zoom. “And for 28 years , I’ve been trying to make this game.” © Wizards of the Coast Magic fans are perhaps no strangers to  Mood Swings , conceptually at least, already.…