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So to boil it down, Dash is an alternate cost that gives the permanent with it haste but will then return back to hand at the end of the turn

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But can they kill you faster than you can get to 8 mana, slam your commander, and then follow up with every creature in your hand for free

Im not sure if this could be replicated or not, but it seems like with the right tools/skill it could be done

Not sure which fits your play style