Underlegion 
Lazarus League
Propagate multiplies Lazarus payoffs — Reanimate, Spikes and Unstable stack across an ever-growing shroom army that never runs out of bodies.
Build this combo →Monster Train 2 Best Clan Combos
Start with a clan you enjoy, then choose an ally that supports its engine or covers a weakness. These 14 recommendations explain the mechanics behind each pairing, using the community sources reviewed in July 2026. They are editorial picks for patch 2.2.1, not measured win rates.
Community favourites
Named independently across several sources.
Melting Remnant Lazarus League
Reform and Reanimate bring the same units back again and again, multi-triggering Extinguish and Harvest payoffs on every death.
Build this combo → Melting Remnant 
Pyreborne
Cheap dragons make strong Reform targets, and constant Burnout deaths feed gold and Dragon's Hoard scaling.
Build this combo → Underlegion 
Hellhorned
Hellhorned Rage and Armor hold the floor while the shroom swarm snowballs safely behind it.
Build this combo →
Luna Coven 
Awoken
Awoken tanks, heals and Regen protect fragile Conduit casters — both clans reward the long fight.
Build this combo →
Railforged Lazarus League
Forge loves the Lazarus equipment pool: crafted gear and multi-equip paths stack huge stat lines.
Build this combo →Also recommended
Solid combos with fewer independent sources behind them.
Railforged Hellhorned
Rage aggression on top of Forge armor and equipment makes balanced floors that hit hard and hold.
Build this combo →
Banished Hellhorned
Valor plus Rage and Armor stacks single units into carries that both hit hard and survive.
Build this combo →
Stygian Guard Pyreborne
Spell-slinging plus economy: Frostbite chip damage and sweep spells, with Pyreborne gold covering the gaps.
Build this combo →Underlegion Banished
Propagate multiplies Valor carriers — the swarm turns Shift payoffs into army-wide scaling.
Build this combo →Railforged Melting Remnant
Burnout and Reform cycling triggers repeated Forge bursts on units that keep coming back.
Build this combo →Lazarus League Hellhorned
Rage significantly boosts what Unstable experiments hit for.
Build this combo →Pyreborne Underlegion
Shrooms chump-block while gold and dragon damage develop — Propagate helps almost any payoff.
Build this combo →Luna Coven Stygian Guard
Conduit plus Incant turns attuned spells nuclear — at the cost of a fragile early defense.
Build this combo →What about Wurmkin and Umbra?
- Wurmkin — Sources agree Wurmkin spikes hard with the right ally — "gods when paired" — but no single pairing dominates the discussion; recommendations scatter across partners.
- Umbra — Described as genuinely self-contained: the Morsel-and-Gorge engine wants its own pieces, and no ally pairing stands out in community discussion.
That's a pairing observation, not a power ranking; see the tier list for how each clan rates on its own.
How to choose your primary and allied clan
Choose the primary clan for the champion and path you want to play; choose the ally for cards that make that plan more reliable. Reversing the pair changes the champion choice, so two runs with the same clans can need different drafts. Compare both clans in the champion and upgrade-path roster before deciding which leads.
A useful draft check is to ask what the deck still lacks: a unit that survives the opening turns, enough damage to finish the boss, or the draw and Ember to play the important cards together. Use the pairing explanation to identify the shared mechanic, then inspect its exact keyword rules. Shared labels alone do not guarantee that two cards trigger each other.
The “Build this combo” links preselect both clans in the Deck Builder; they start with an empty list so you can model the cards you actually found. Match that plan to a Pyre Heart, or use the clan unlock guide if a recommended clan is still locked.
Does a lower-tier clan make a bad ally?
No. The clan tier list evaluates overall consistency; a pairing evaluates how two card pools fit together. A clan with demanding setup can still supply the specific spell, defense or scaling effect another clan needs. The Wurmkin note above is why we keep those two questions separate.
How this list is made
We synthesize public community signals rather than invent combos: Steam Community pairing threads, r/MonsterTrain "go-to combo" discussions, and post-Railforged rankings from 2026. A pairing makes the list only when at least one real source recommends it; "community favourites" are the pairs named independently across several. Order within a pair follows the more common primary pick, but most combos work either way — champion choice usually decides which clan leads.
- Double-magic pairings (like Luna Coven + Stygian Guard) are debated: huge spell ceilings, but sources flag the fragile early defense.
- Railforged pairings lean on early-2026 post-DLC discussion; that part of the meta is the youngest and most likely to move.
Sources synthesized for this page: