Combo · ENGINE

740.2.a makes 'alone' an own-side measurement - the enemy garrison is irrelevant and your own is the cost

6 cards · calm · verified

Pieces

• Wielder of Water ×3 OGN-055 · payoff · calm

  While I'm attacking or defending alone, I have +2 Might.

• Mask of Foresight ×3 OGN-060 · engine · calm

  When a friendly unit attacks or defends alone, give it +1 Might this turn.

Payoff

Deck

• Both cards are mono-Calm, so 103.1.b.3 admits any legend with Calm in its pair.
• Neither card is banned or restricted in either format, and neither is a Signature card.
• A battlefield where you have exactly ONE unit - which is a real deckbuilding constraint, not a play pattern.

Run play

• The Wielder and the Mask each do the other's job, and a plain body does both

Prerequisites

• THE DEFINITION, WHICH IS THE OPPOSITE OF THE OBVIOUS READING. 740.2.a: 'A unit is alone when there are no other friendly units at the same location.' So 'alone' counts YOUR side only: the enemy may have a full garrison and your body is still alone. 740.2.b is the neighbouring term and it is stricter - 'A unit is one on one when it and the enemy unit at the same location are both alone' - and a card that says one requires nothing of the other.
• SO THE COST IS YOUR OWN BOARD, AND IT IS PAID IN THE DAMAGE STEP. 465.2.c: 'Starting with the Attacker, each player assigns an amount of damage equal to their summed Might among the other's Units.' A lone attacker's summed Might is one body's, against a whole garrison's; 465.2.c.3 then forces lethal onto one body at a time, so a lone raider kills at most one thing and eats everything. These cards pay +3 for a position that costs far more than 3 - which is why they belong in a deck built around a single large body, not spread across a curve. CORRECTED 2026-10-18 (#415, from the run play docs/plays/2026-10-18-the-wielder-and-the-mask-each-do-the-others-job-and-a-plain-body-does-both.md): "a lone raider kills at most one thing and eats everything" is half wrong. The second half is right: it receives the sum of the whole other side (465.2.c). The first is not. A lone unit assigns its whole Might lethal-first like any side, 465.2.c.3: "Units must have lethal damage assigned to them in full before damage is assigned to a different Unit.", so a 5 kills a 3 and a 2. In the play's walk the lone Wielder defending at 7 could kill SFD-159 Trusty Ramhound and OGN-210 Daring Poro (3 + 3) or OGS-006 Lux, Illuminated (5).
• NEITHER BONUS IS A BUFF, WHICH MATTERS FOR STACKING. The Wielder's is a continuous 'While I'm...' modifier and the Mask's is '+1 :rb_might: this turn', so 702.3's one-buff-per-unit cap and 703's fixed +1 are silent and both apply on top of a real buff. On a lone Wielder the total is 2 + 2 + 1 = 5 Might, which crosses 709's Mighty threshold and switches on anything reading it.
• AND THE MASK PAYS FOR ANY LONE BODY, NOT ONLY THIS ONE. Its trigger says 'a friendly unit', so in a two-battlefield Duel (485.4) with one body at each, it fires twice a combat round - once for the attacker and once for the defender. It has no exhaust in its cost, so nothing caps it but the number of lone bodies. CORRECTED 2026-10-18 (#415, from the run play docs/plays/2026-10-18-the-wielder-and-the-mask-each-do-the-others-job-and-a-plain-body-does-both.md): right that it pays any lone body, and that makes the Wielder optional. A lone OGN-054 Sunlit Guardian (Calm, E3, M3, "[Shield] (+1 :rb_might: while I'm a defender.)") defends at 3 + 1, the Wielder's 2 + 2, under any legend. The Wielder is one better only while attacking alone, and worse beside any other unit (2 against 3). In the walk the Guardian in its place ended the same 5 to 2. But "it fires twice a combat round - once for the attacker and once for the defender" is wrong. The Core Rules define no combat round. The Mask fires once per combat in which a unit of yours attacks or defends alone, checked as the designation is gained, 383.4.e.2.b: "If the trigger condition contains other requirements besides attacking and if those requirements are not fulfilled when the unit gains the Attacker designation, it will not trigger in that combat." (383.4.f.2.b says the same for defending). You choose your attacks and the opponent chooses theirs. In the walk it fired once on your T3 and once on their T4, and zero times on their T3, because its +1 made both lone garrisons unprofitable to attack. That deterrence is real, but it is not the Mask's alone: with no Mask, a Sunlit Guardian played beside the lone garrison made it the same 7 with no alone bonus, and the no-Mask hand ended the same 5 to 2. The Mask is +1 to a body you could not afford to give company. Worth naming: OGS-019 Wuju Bladesman - Starter ("While a friendly unit defends alone, it gets +2 :rb_might:.", restricted in 2v2) is a third "alone" bonus, and under it a lone Wielder defends at 2 + 2 + 2 + 1 = 7.
• THE FAMILY, NAMED. The pool's 'alone' cards are OGN-055 Wielder of Water, OGN-060 Mask of Foresight, SFD-036 Lonely Poro, OGS-019 Wuju Bladesman - Starter, UNL-117, UNL-124, UNL-143, UNL-156 Loyal Poro (the mirror of Lonely Poro: 'If I didn't die alone, draw 1') and UNL-210 Forbidding Waste - nine in all. The two walked here were both uncatalogued and are the two that PAY a lone body rather than reading someone else's.
• AND THE DESIGNATION IS STILL REQUIRED. 807.1.d ties 'attacking' to the Attacker designation and 323.9 stages a Combat only where opposing units are present, so neither bonus exists on a walk into an empty battlefield - the same trap the [Assault] family carries.
• WHAT IT IS NOT. Nothing here scores; 469 defines Scoring as Conquer or Hold.
• NO ANSWER WAS NAMED - ADDED 2026-10-18 (#415, from the run play docs/plays/2026-10-18-the-wielder-and-the-mask-each-do-the-others-job-and-a-plain-body-does-both.md). These are examples, not a census. SFD-064 Cloth Armor (Mind gear, E1, no Power, [Quick-Draw] so it has [Reaction], "[Effect] [Shield 2] (+2 :rb_might: while I'm a defender.)"), on the 3-Might defender a lone 5 attacks, makes it a 5 against a 5: both die and the battlefield ends nobody's (466.5.b: "If there are no Units remaining here controlled by any player, the Battlefield becomes Uncontrolled."). VEN-052 Mesmerize (Mind, E1 + 1 Mind Power, [Reaction], "Give an enemy unit -2 :rb_might: this turn.") does the same from the other side, a 3 against a 3. Any body hidden at the battlefield the lone unit walks into lands there (811.1.d.3: "If a hidden spell or a play effect of a hidden permanent causes you to play a unit, you must choose to play that unit at that battlefield.") and adds to the sum the lone unit must beat; the play found ten hidden Mind/Order cards that stop the walked Conquer, seven of them that way. UNL-210 Forbidding Waste, a colourless battlefield ("While a unit here is defending alone, it has -2 :rb_might:."), cancels a +2 on any lone defender there, yours or theirs.

Steps

1. Play Mask of Foresight (2 Energy). It is a standing permanent and its trigger has no cost. CORRECTED 2026-10-18 (#415, from the run play docs/plays/2026-10-18-the-wielder-and-the-mask-each-do-the-others-job-and-a-plain-body-does-both.md): the order is wrong. Units enter exhausted (143.4: "Units enter the Board exhausted.") and the Mask needs no ready turn, so the lone body goes down first and the Mask on the turn of its first lone combat. Walked as the entry orders it, the Mask on T1 took the turn the first body needed, and all three lines from there ended 2 to 3, against 5 to 2.
2. Send exactly one unit to a battlefield. 740.2.a checks only your own side, so the enemy garrison's size is irrelevant to whether it is alone.
3. The Mask fires for +1, and a Wielder of Water adds its own +2 - 2 + 2 + 1 = 5 Might, which is Mighty by 709.
4. Read 465.2.c before committing: a lone attacker assigns one body's Might and receives the whole garrison's.
5. In a Duel the Mask pays twice a round if you keep one body at each of the two battlefields (485.4). CORRECTED 2026-10-18 (#415, from the run play docs/plays/2026-10-18-the-wielder-and-the-mask-each-do-the-others-job-and-a-plain-body-does-both.md): there is no round. It pays once per combat a lone body of yours is in, and the opponent decides how many of their attacks there are (the any-lone-body notable).

Per iteration

+1 Might per lone body per combat from the Mask, and +2 more on a Wielder of Water

How it ends

engine only - the Mask has no cap and no cost, but every point of it is paid for by keeping a battlefield garrisoned by exactly one body; nothing here scores CORRECTED 2026-10-18 (#415, from the run play docs/plays/2026-10-18-the-wielder-and-the-mask-each-do-the-others-job-and-a-plain-body-does-both.md): true of the cards, but the walked line's points come from what they let a lone body take and keep. Against an opponent who stacks their own battlefield and never attacks, nothing of yours fights alone and the engine is blank: 3 to 3 with or without it.

Sources

Published elsewhere

• Riftbound Core Rules, Last Updated 2026-07-16 (data/Riftbound-Core-Rules-2026-07-16.txt) 2026-07-16
• Card text verbatim from data/corpus_flat.txt (built from Riot's gallery content API) 2026-09-07

Walked here, in this project

• Hand walk 2026-09-07 (docs/phase0/walks/2026-09-07-uncatalogued-calm-mind-order.md, batch 4) 2026-09-07 record
• Run play 2026-10-18, issue #411 2026-10-18 record

Walked against Core Rules 2026-07-16

Match a deck list against the whole catalogue