Unfortunately that does not work. When the ability resolves it will put a counter on Jar. You will have to either blink or destroy the Jar in response to the activation to be able to cast a 0 CMC spell.
I feel like the unbanned them cause they’re reprinting them in Eternal Masters format and wanted to test out the reaction. Considering this was was probably planned before Battle for Zendikar was released last year.
I agree that these unbannings won’t turn modern updsidedown. Perhaps some rogue brews will arise, but Ancestral Visions is just too darn slow. Infect and Affinity aren’t going to stand there for 5 turns while those suspend counters tick down. As for Sword of the Meek? Rest in Peace is a top sideboard choice and stops graveyard recursion cold.
All I read from the unban announcement is that Sword of the Meek and Ancestral Recall are being reprinted in the next year. I know Wizards didn’t say that… but it just seems like the timing can’t be a coincidence.
As for control and these bans… U/W control with JVP was already emerging as a Top 8 contender in Modern and was starting to perform well… even before Eye of Ugin was banned. I wonder if Wizards is over-doing it with these unbans. Should be interesting. I’m also wondering if everyone is looking at the “combo” to hard… Maybe Sword of the Meek fits nicely into a U/R Thopter list and makes it that much better, even without Thopter Foundry? Or maybe we see U/R/B Thopters??? Who knows, have fun brewing everyone!