Propagate in Monster Train 2
Increase existing eligible Buff stacks on friendly units and Debuff stacks on enemy units by the stated amount. Dazed is excluded.
6 cards use Propagate.
The card list covers direct mentions in base card rules. Champion upgrade paths are shown separately below. Game data · patch 2.2.1
What does Propagate do?
Propagate adds the printed amount to eligible effects already on a target. On a friendly unit it grows Buffs; on an enemy it grows Debuffs. It does not double the current total or add every possible status. With Propagate 2, an existing Valor 3 becomes Valor 5.
Why did Propagate do nothing?
Check the target before playing the card. It needs a matching stackable effect already present: for example, Valor or Regen on an ally, or Decay on an enemy. Dazed is explicitly excluded. Armor, Quick and Multistrike are persistent effects in the game data, rather than eligible Buffs, so they are not a substitute for setting up a Buff first.
Propagate, Spawn and Funguy Troop stacks
Troop is a Buff, so Propagate can grow an existing Funguy stack. Spawn is the separate action that summons Funguy at the front of the floor. If you want to grow Troop, establish the Funguy first; then compare its existing Buffs before spending a Propagate card.
Choose the target and timing
Read each source separately. Contagious targets enemy units; Proliferate mentions all units. Grow Room applies its effect after combat, while Shroomponics applies it at the start of the turn. Use the exact rules below to tell an immediate spell apart from a repeated effect; their timing changes which statuses are present when propagation happens.
Which clans have Propagate cards?
All 6 Propagate cards
Advance. Propagate 2.
All units Propagate 1 at the end of combat.
Consume. Propagate 2 on all units.
Consume. Enemy units Propagate 4. Add a copy of this card to your discard pile.
+20 Health Resolve: Gain Regen 1. Propagate 2.
Consume. Propagate 2X.
Propagate on Bolete the Guillotine’s Headsman path
This is a champion upgrade-path source, separate from the base-card list. The game data records these exact tiers:
Headsman
+20 Attack · +5 Health · +1 Trample · Slay: Friendly units Propagate 1.
Headsman II
+50 Attack · +10 Health · +1 Trample · Slay: Friendly units Propagate 2.
Headsman III
+150 Attack · +15 Health · +1 Trample · Slay: Friendly units Propagate 4.
Propagate beyond cards
These entries mention Propagate in their effects or abilities; a shared keyword alone does not guarantee a combo.
Artifacts with Propagate effects
- Evolutionary Instinct — When a unit has a third unique status effect applied to it, Propagate 2.
- Shroomponics — At start of turn, friendly units Propagate 1.
Propagate questions
Does Propagate increase Dazed?
No. The Propagate reference explicitly excludes Dazed, even though Dazed is a Debuff.
Does Propagate create new Buffs?
It increases eligible stacks already on a unit. Apply the Buff or Debuff first, then use Propagate to increase it.
Does Propagate work on allied clans?
The effect checks eligible statuses and the card’s target, rather than requiring an Underlegion unit. The developer’s explanation specifically uses Valor as an example.
Sources and scope
Mechanics checked 2026-09-14. The explanations use the developer’s overview and the action reference; exact card and artifact values come from the recorded game-data snapshot.
- Shiny Shoe — Introducing The Underlegion — Developer explanation of friendly Buffs, enemy Debuffs, and the Valor, Troop and Decay interactions.
- Monster Train 2 community wiki — Propagate and Spawn — Action definitions, including the Dazed exception. Cross-checked against the game-data propagation flags.
- RailTools game-data sources — Card effects, artifact text and champion path tiers on this page use the recorded patch 2.2.1 dataset.