Twirligig Mechs

Rumble · Radiance · v3 · Midrange

Hold battlefields with Shielded Mechs while turns Gold, Recruits and spent bodies into a steady stream of 3 Might Mechs. Tuned for the Radiance field: a real turn-1 play that kills their cheap openers, and a sideboard that answers their gear and breaks their holds.

Win condition. Take the early points with cheap units, then hold with Shielded Mechs while Twirligig out-produces the opponent's removal. Close by giving the Mech board Assault () or Ganking () to score over their last hold.

Decklist

Units · 24

22e

23e

34e

26e1p

36e1p

26e1p

18e2p

Gears · 3

34e1p

Spells · 12

21e1p

22e1p

23e

23e1p

23e

24e1p

Champion

15e1p

Battlefields

Runes · 12

6Fury Rune

6Mind Rune

Sideboard · 10

24e

24e1p

27e1p

24e1p

22e1p

Validator: LEGAL · main 40/40 · side 10/10 · runes 12/12 · battlefields 3/3

Legend:
1 Rumble, Mechanized Menace

Champion:
1 Rumble, Scrapper

MainDeck:
3 Whirling Twirligig
2 Jayce, Brilliant Inventor
3 Rumble, Hotheaded
3 Industrious Mechsmith
3 Ferrous Forerunner
2 Antagonistic Apparatus
2 Bubble Bot
2 Gem Jammer
2 Forecaster
2 Blast Corps Cadet
1 Breakneck Mech
2 Production Surge
2 Danger Zone
2 Wages of Pain
2 Lost to the Sands
2 Eclipse
2 Smoke Screen
2 Ruined Rex

Battlefields:
1 Altar to Unity
1 Grove of the God-Willow
1 Veiled Temple

Runes:
6 Fury Rune
6 Mind Rune

Sideboard:
2 Assembly Rig
2 Rocket Barrage
2 Thousand-Tailed Watcher
2 Riptide Mage
2 Brittle Steel

Changes from v2

−2 Plaza Guardian +2

Plaza Guardian fails the win-more test (Fundamentals p.34-35): it's cheap only once you're already ahead. takes the deck from 4 to 6 turn-1 plays and kills the 1-2 Might openers every meta deck plays.

−1 Detonate (side) +1 (side)

Riven and Kennen are value decks, and Detonate's "its controller draws 2" feeds them. kills any gear and has Flow to replay it from the trash.

Strategic quality profile

State	medium-high	Contests turns 1-2 now
Conversion	medium-high	Same engine
Information	medium	Vision on Mechs, Eclipse's Predict
Flexibility	medium	Lost Plaza Guardian's late body; more early plays
Restriction	medium	Cadet adds early disruption
Alignment	high
Risk	medium	Twirligig is still the engine; all three meta decks have gear hate post-board

Preferred: v3 over v2 for the Radiance field, carried by State and Restriction.

Decisive assumption: Contesting the first points matters more against these three decks than Plaza Guardian's late body, and Cadet will usually find a 1-2 Might target at a battlefield.

Confidence medium-low · testing sample none

If you observe… (refinement swaps)

Cadet rarely has a target, or games go long without a big body

−2 +2 Plaza Guardian

Gives up: Turn-1 plays drop back to 4

Kai'Sa wipes keep clearing your board

−1 , 1 +1 , 1 Watchful Sentry

Gives up: A Mech token + draw and a cheap Mech

Twirligig is answered in most post-board games

−1 , 1 +2 Bilgewater Tracker

Gives up: Engine redundancy and the second activation

Fury Power cards are stranded

−1 Mind Rune +1 Fury Rune

Gives up: Reliability of Mind Power cards

Try first: R2 if Kai'Sa is the deck you face most: it's the matchup where the Mech-token plan is most exposed, and the swap is cheap to test.

Low-confidence calls

Opponents' game-2 plans for Kai'Sa and Riven are adapted (low confidence); Kennen's is exact but assumes Rumble maps to its azir plan.
Tokens leaving play (bounced or banished) don't come back; not a confirmed ruling.
Two meta lists are carried over from Set 4 (Kai'Sa's guide text, Kennen entirely).

Rulings used

Mech tokens receive Rumble's Shield; a Mech token played by an effect triggers Vision; gear tokens count as gear (confirmed, 2026-11-06).
Power must match the card's domain (confirmed, 2026-11-06).
Kai'Sa's Legend adds 1 Power of any domain for spells (confirmed, 2026-11-08), so her arrives sooner than her rune split suggests.

Full write-up in the repo: decks/2026-11-08-rumble-mechanized-menace-twirligig-mechs-v3.md