Combo · ENGINE

Exactly two cards in the pool pay for 'becomes Mighty', and only one of them has no exhaust — Fiora readies once per crossing, the Duelist once per turn

4 cards · body + order · verified

Pieces

• Grand Duelist ×1 SFD-205 · legend · body/order

  When one of your units becomes [Mighty], you may exhaust me to channel 1 rune exhausted. (A unit is Mighty while it has 5+ Might.)

• Fiora, Worthy ×1 SFD-180 · engine · order

  When a unit you control becomes [Mighty], you may pay 1 Order Power to ready it. (A unit is Mighty while it has 5+ Might.)

• Riposte ×1 SFD-206 · enabler · body/order

  [Reaction] (Play any time, even before spells and abilities resolve.) Choose a friendly unit and a spell. Counter that spell and give that unit +Might equal to that spell's Energy cost this turn.

• Deathgrip ×1 SFD-163 · enabler · order

  [Reaction] (Play any time, even before spells and abilities resolve.) Kill a friendly unit. If you do, give +Might equal to its Might to another friendly unit this turn. Draw 1.

Payoff

Deck

• Legend domains are Grand Duelist's own, Body and Order; Fiora and Deathgrip are Order and Riposte is Body/Order.
• SFD-210 Hall of Legends ('When you conquer here, you may pay [E1] to ready your legend') is the battlefield that lifts the Duelist's once-a-turn cap — and 485.4.a makes it 1 of your 3, so it is not a given.

Prerequisites

• 709 IS THE GATE AND ITS OWN EXAMPLE IS THE WARNING: 'A Unit "becomes Mighty" at the moment its Might changes from being less than 5 to being 5 or greater' — and 'A Unit with Might 5 that gets +1 [M] does not become Mighty, because it was already Mighty.' Pumping a body that is already at 5 pays nothing. Every crossing in this entry starts under 5.
• 'BECOMES [Mighty]' IS EXACTLY TWO CARDS IN THE WHOLE POOL, AND THE UNIQUENESS CLAIM WAS GREPPED, NOT REMEMBERED. `grep -i 'becomes \[*mighty'` over all of data/corpus_flat.txt returns SFD-180 Fiora, Worthy and SFD-205 Grand Duelist and nothing else. The catalogue already had Fiora; the Duelist was in no entry.
• THE ASYMMETRY IS THE FINDING. Fiora's cost is 'you may pay [R Order]' with no exhaust, so she pays out on EVERY crossing in a turn, bounded only by Order Power. The Duelist's is 'you may exhaust me', so it pays out once and then waits for 415.3.a's Awakening Phase — or for a Conquer at Hall of Legends. Two crossings in one turn is one channelled rune and TWO readyings.
• THE CHEAPEST CROSSING IS DEATHGRIP, AND IT CAN CROSS TWO BODIES WITH ONE CARD. 'Kill a friendly unit. If you do, give +[M] equal to its Might to another friendly unit this turn. Draw 1.' Kill a 5 Might body and a 3 Might body goes to 8 — one crossing, one card drawn, 2 Energy. If the body you kill was itself pushed over the line first, that was a second crossing.
• RIPOSTE PAYS BY THE COUNTERED SPELL'S COST. '+[M] equal to that spell's Energy cost' — countering a 3 Energy spell puts +3 on a friendly unit, so a 3 Might body crosses; countering a 1 Energy spell puts +1 and crosses nothing that was not already at 4. The size of the crossing is the opponent's choice, not yours, and the entry says so.
• THE CHANNELLED RUNE IS EXHAUSTED, SO IT IS NOT THIS TURN'S ENERGY. 'Channel 1 rune exhausted' puts a rune on the board that cannot be exhausted again this turn; what it buys is a permanent rune, measured against the free floor of 2 Power a turn every deck already has (164.2.b, 161.2.b, 315.3.b, 430.4.a).
• THE PUMPS ARE 'THIS TURN'. Riposte and Deathgrip both say so, so a body that crossed the line falls back under it at cleanup and can cross again next turn. That is what makes the engine repeat, and it is also why no board state is claimed.
• OVERLAP DECLARED. world-atlas-fiora-worthy-ready runs Fiora with SFD-086 World Atlas, a gear that crosses the line by attaching; unsung-hero-sacrifice-double-draw runs SFD-167 Unsung Hero over the same line with B.F. Sword. This entry is the spell-speed half — two [Reaction] crossings that cost no attachment — and it names the Duelist, which neither of them has.

Bodies no card supplies

Push a friendly unit under 5 Might over the line: Riposte (2 Energy + 2 Power) counters a spell and adds its Energy cost, or Deathgrip (2 Energy) kills a friendly body and moves its whole Might onto another and draws 1

Steps

1. Have Fiora, Worthy on the board and Grand Duelist ready (415.3.a gives the legend back each Awakening Phase).
2. Push a friendly unit under 5 Might over the line: Riposte (2 Energy + 2 Power) counters a spell and adds its Energy cost, or Deathgrip (2 Energy) kills a friendly body and moves its whole Might onto another and draws 1.
3. 709 fires both payoffs on that single crossing: exhaust Grand Duelist to channel 1 rune exhausted, and pay 1 Order Power to Fiora to ready the unit that crossed.
4. Cross a second body in the same turn and Fiora pays again for another Order Power; the Duelist does not, unless a Conquer at Hall of Legends bought it back for 1 Energy.
5. The pumps expire at cleanup, so the same bodies are back under the line for tomorrow's crossings.

Per iteration

per crossing: one unit readied for 1 Order Power, plus one rune channelled exhausted for the first crossing of the turn; Deathgrip adds a card on top

How it ends

engine only — Fiora is bounded by Order Power and by how many bodies you can push over the line, the Duelist by one exhaust a turn; nothing here scores

Sources

Published elsewhere

• Riftbound Core Rules, Last Updated 2026-07-16 (data/Riftbound-Core-Rules-2026-07-16.txt) 2026-07-16
• Corpus de 8.307 listas de torneo — issue #89 (GitHub) 2026-09-06

Walked here, in this project

• Hand walk 2026-09-06 2026-09-06 record

Walked against Core Rules 2026-07-16

Match a deck list against the whole catalogue