The event lasts until Tuesday the 19th. You play Bo1 games with 60-card decks using cards from GRN, RNA, WAR, and MKM, and you're not restricted to cards in your collection.
About
Name Ravnica Flash
Deck
7 Island
7 Plains
4 Hallowed Fountain
4 Meticulous Archive
2 Mobilized District
1 Cryptex
4 Doorkeeper Thrull
4 Deduce
4 No More Lies
4 Sinister Sabotage
4 Absorb
2 Teferi, Time Raveler
2 Chemister's Insight
4 Warrant // Warden
2 Intrude on the Mind
3 Time Wipe
2 Commence the Endgame
This one is maybe a little mean for a fairly casual event, but then again maybe not, since I'm seeing a lot of people play similar decks. I don't know; I just seem to gravitate to blue decks where you can play most of your cards on your opponent's turn. You actually have several options for curve-toppers here; consider [[Dream Eater]] or [[Angel of Grace]] as alternatives to the ones I went with.
About
Name 2 Massacre 2 Girl
Deck
6 Swamp
4 Plains
4 Godless Shrine
4 Shadowy Backstreet
3 Escape Tunnel
2 Blast Zone
1 Mobilized District
2 Price of Betrayal
4 Dead Weight
4 Hunted Witness
4 Imperious Oligarch
4 Despark
2 Bleeding Edge
1 Kaya, Spirits' Justice
4 Massacre Girl
4 Massacre Girl, Known Killer
3 Ethereal Absolution
4 Slice from the Shadows
You can play both Massacre Girls in this format, how cool is that? I got this idea from an opponent but I didn't remember their deck well enough to copy it. I think they had a lifegain focus. Mine is basically just toughness-based control. Be careful how you stack your triggers! Sometimes you want your tokens to come into play in time to die. The two Prices of Betrayal are a nod to our bad match-up against Superfriends decks, which understandably are pretty popular in a format where War of the Spark is a quarter of the card pool.
In the Massacre Girls list I've removed the Prices of Betrayal along with one Despark and one Bleeding Edge to make room for four copies of Soul Search, to try for a better match-up against control without giving up too much ground against planeswalkers. It seems to have been an improvement.
Here's a pretty obnoxious Feather list that's done well in the few games I've played with it so far. The numbers might still need to be tweaked.
In case you couldn't tell, I'm really enjoying this format.
About
Name Feather Heroic
Deck
6 Plains
8 Mountain
4 Sacred Foundry
2 Elegant Parlor
2 Guildmages' Forum
4 Frantic Scapegoat
4 Goblin Banneret
2 Dreadhorde Arcanist
4 Swiftblade Vindicator
4 Tenth District Legionnaire
4 Feather, the Redeemed
4 Defiant Strike
4 Gird for Battle
4 Maximize Velocity
3 Lightning Helix
1 Connecting the Dots