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At time of writing, WotC has not released another variant of Jumpstart products like J22

All that being said, Gideon Blackblade doesnt really fit in competitively

You either play a black midrange style deck to wait for those so you can get Tetzimoc in hand to do the reveal trick to do a board wipe, you know more midrangey things, or you toss in a bunch of tutors to make a more expensive way to do midrange from the command zone

Fling Flings are single-use effects, but they're cheap and versatile

Twist the battlefield, rewrite the rules, and turn overwhelming spells into unstoppable force as chaos reshapes everything in its path

Plus it has warp, so you can get it into play early and recast it later