You dont even need to pay the echo cost, as most damage has been done upfront
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However, Marchesa, Nekusar and Progenitus decks are running this already and Dark Intimations makes Bolas a little better, which may be all thats needed for a card that has held a very decent price for the number of printings its had for a while and which could just be waiting for a little push
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As it is, its really good in squirrel decks like Chatterfang or Hazel, and you can even conjure it with Euru, Acorn Scrounger on MTG Arena
If the cube cards werent already sleeved, have each player sleeve up their deck
