Well, it’s still early season and ladder will be a bit harder. But if I have time to get a swarm list to diamond I’ll post it 
Is there a viable swarm deck?
Here is my deck:
Also, how to make my decks look like this one on the second post. DuelystDB is not updated.
That looks more like a ramp deck, rather than swarm. Swarm decks use bloodmoon priestess and aim to get a lot of wraithlings on the board, while yours seeks to get large minions out using un7 and darkfire sacrifice and nether summoning. I’d scrap the void hunters regardless of what deck you’re running, they’re generally considered to be weak. If you really need card draw, I’d suggest spelljammer or l’kian.
OMG I screencaped the wrong deck… 
Black locust literally die by every AOE in the game. It also need 1-2 turns to set up and it’s expensive as fuck. Isn’t Boloodmoon better? Why is Void Pulse there? Also what rank?
Share the link to the deck builder please. 
Yes thank you, I think your right.
Maybe throw in a couple of Bloodmoons instead of Locusts,
perhaps Reaper of the Nine Moons in substitute of the Voids.
This deck is a current 80% complete build of a rank 13 possible fore-runner. But I think can compete to even further heights.