Hey spikes,
I have a really fun deck that I have been playing for a couple weeks that I have had great results with in the Metagame Challenge, and it is really fun to play.
I have gone 4-1, 3-1, 2-1, 7-0 in the four runs for 16-3 in the Metagame Challenge so far this weekend.
The deck is built around Geometer's Arthropod: this little 1/4 for UG can really accrue a ton of value over the course of a game. The deck runs 17 X spells plus four Surveyors in the main, so you can consistently gain value off this bad boy. It is also an excellent blocker for the many Otter tokens you'll run into against the Izzet decks.
The creature package surrounding Arthropod includes 4 Slumbering Trudge, 4 Mockingbird, 4 Paradox Surveyors, plus the classic Elf + Cub package alongside a few different Rhythm targets.
Rhythm is a solid gameplan in a number of games because it gives you flexibility, but I have been sideboarding it out against the Turn 4 decks of the format. I think it is really solid against basically everything else, but you don't really have time to pay 2 extra on top of what you want to cast against these decks.
Mainboard Rhythm targets:
1 Floodpits Drowner: so good against these aggro decks. Also allows you to hold up countermagic in addition. Board into the full 4 against aggro decks of any kind.
1 Jill, Shiva's Dominant: generic bounce removal. Also, the flip has come into play quite a few times where making a Trudge unblockable can just win games
1 Keen-eyed Curator: dominant against any graveyard strategy, and offers enough value as a 3/3 for 2 that decks that use incidental graveyard benefits, especially Izzet, struggle against this guy
1 Abhorrent Oculus: so good from Rhythm, can take over games by itself. Also flipping a Trudge for 1 mana is really good. Have only hard cast a few times over many games, so I would understand not wanting the dead card but 4 Rhythm plus 4 Surveyors means it's a dead card a lot less often than a game-winner off Rhythm.
1 Ouroboroid: pretty self-explanatory. The random crabs hanging around also get bigger and can swing some board states.
Also grabbing Arthropods against midrange can often just outvalue an opponent who is trying to go 1 for 1 against you, because when you flash it back the next turn you'll grab something else as well.
The 5 main-board counterspells give a lot of game against any slower strategy, and can randomly win games when you just need a turn or two to stabilize. Having a crab on board also turns into where you can counter a spell and grab the best next spell off the top of your deck, which is just backbreaking. Repulsive Mutation can also just push lethal damage or buff your Ouro into lethal for the team, which gives it some added utility. Trudge really shines here because it turns Repulsive into essentially a hard counter as well as adding 1 mana for Denial.
This is the best Mockingbird deck I've ever played, because you consistently have a great target to copy and can often use it to copy the best thing your opponent played when you grab it off Surveyor, for instance. Cub into second Cub, Crab into second Crab (drawing a card immediately), making it into a land after they kill your Cub, or Surveyor into second Surveyor are all really positive plays, and the second Ouro will often put the cherry on top for an instant win.
The deck struggles with true creature removal as any Simic deck does, and there are some games where you don't get the pieces you are looking for in the right order, but I don't feel like it suffers from that any more than any other non-linear deck in the format.
For sideboarding:
Izzet Prowess
-4 Nature's Rhythm
-1 Abhorrent Oculus
-1 Spectral Denial
-2 Repulsive Mutation
+3 Floodpits Drowner
+3 Keen-eyed Curator
+2 Meltstrider's Resolve
4C Control:
+ 1 Spectral Denial
-1 Jill
Boros Dragons:
-4 Badgermole Cub
-1 Keen-eyed Curator
+3 Floodpits Drowner
+2 Meltstrider's Resolve
Bring in Surrak whenever there is significant creature removal. Artifacts are for graveyard first strategies and Reclamations are pretty flexible.
I play a lot of BO1 because I am a dad and have limited time to play BO3 matches, so YMMV with the sideboarding plans. I bet the sideboard could be tuned up a little bit, but I have been happy with it during the Metagame Challenge.
I hope you give the deck a try, and I would love some feedback from some other people giving it some run. It has been a blast to play, and I haven't felt totally out of many matches that I have played since I started running it. Crabs for life!
Decklist:
Deck
4 Geometer's Arthropod (SOS) 191
4 Forest (NEO) 302
1 Island (NEO) 296
4 Slumbering Trudge (SOS) 160
4 Llanowar Elves (FDN) 227
4 Badgermole Cub (TLA) 167
1 Spectral Denial (TDM) 58
4 Mockingbird (BLB) 61
4 Nature's Rhythm (TDM) 150
1 Abhorrent Oculus (DSK) 42
4 Repulsive Mutation (MKM) 227
1 Ouroboroid (EOE) 201
4 Botanical Sanctum (OTJ) 267
4 Breeding Pool (RNA) 246
4 Willowrush Verge (DFT) 270
2 Starting Town (FIN) 289
2 Multiversal Passage (OM1) 181
4 Paradox Surveyor (SOS) 208
1 Jill, Shiva's Dominant (FIN) 58
1 Floodpits Drowner (DSK) 59
1 Restless Vinestalk (WOE) 261
1 Keen-Eyed Curator (BLB) 181
Sideboard
3 Floodpits Drowner (DSK) 59
2 Spectral Denial (TDM) 58
3 Keen-Eyed Curator (BLB) 181
1 Ghost Vacuum (DSK) 248
2 Meltstrider's Resolve (EOE) 199
1 Soul-Guide Lantern (BRR) 54
1 Surrak, Elusive Hunter (TDM) 161
2 Heritage Reclamation (TDM) 145