Combo · ENGINE
Relentless Storm — a rune for a body you were playing anyway
Pieces
- Relentless Storm ×1
OGN-249 · payoff · fury/body
When you play a [Mighty] unit, you may exhaust me to channel 1 rune exhausted. (A unit is Mighty while it has 5+ Might.)
- Perched Grimwyrm ×3
SFD-015 · engine · fury
Play me only to a battlefield you conquered this turn. (You can't play me anywhere else.)
Payoff
Deck
- Fury + Body: Relentless Storm is itself the legend and the Grimwyrm is mono-Fury (103.1.b.3).
- A Mighty unit in hand on the turn you want the rune — one activation a turn, since the legend's cost is its own exhaust.
Prerequisites
- THE TRIGGER IS 'PLAY', NOT 'BECOMES', AND THAT IS THE WHOLE DIFFERENCE FROM THE OTHER MIGHTY LEGEND. SFD-205 Grand Duelist reads 'When one of your units becomes [Mighty]' and is therefore governed by 709's crossing event — it pays only when a sub-5 body is pushed over the line, once per body forever. Relentless Storm reads 'When you play a [Mighty] unit', so it pays on any body that is already 5 or more as it enters, every time, with no crossing and no buff needed. Two legends, one keyword, opposite requirements.
- The rune is free in the strict sense: you were playing the body regardless, and the legend's only cost is its own exhaust, which 315.1.b refunds every Awaken. One a turn.
- It arrives EXHAUSTED, so it is next turn's Energy rather than this turn's — or 1 Power now, since 164.2.b's 'Recycle this: [Reaction] — Add [C]' carries no exhaust in its cost (161.2.b then sends it to the Rune Deck). 430.3 caps the line at what the Rune Deck still holds, which is the real ceiling on any channel engine.
- The identity is wide: a sweep of Fury and Body units at Might 5 or more returns twelve at E5 or less, so a Fury/Body deck triggers this most turns without building for it. The Grimwyrm is named as the cheapest with no Power cost; OGN-150 Kraken Hunter is E3 but demands 2 Body Power, which is the scarcer currency (#21).
- Different from the catalogued pairing: sky-splitter-volibear-free-removal runs this legend with OGN-014 Sky Splitter, where the Might on the board is a DISCOUNT on a removal spell. This is the legend's other half — the ramp — and neither entry needs the other.
Steps
- Play Perched Grimwyrm (E4). It enters at Might 5, which is [Mighty] by 709's threshold.
- Relentless Storm's trigger fires on the play. Exhaust the legend and channel 1 rune exhausted.
- 315.1.b readies the legend at your next Awaken.
- Repeat on any turn you play a unit at Might 5 or more — twelve such bodies cost E5 or less in this identity, so most turns qualify without building for it.
- Each channelled rune is next turn's Energy after the Awaken readies it, or 1 Power at once through 164.2.b at the price of the rune.
How it ends
engine only — one channelled rune on any turn you play a Might-5 body, once a turn, bounded by the Rune Deck (430.3). 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
- Issue #161 (GitHub) 2026-09-06
Walked here, in this project
- Hand walk 2026-09-06, issue #161 — the CAUSE/TRIGGER matrix, family slice rows 40-47 (docs/phase0/walks/2026-09-06-finisher-feeders.md §18) 2026-09-06 record
How this entry was audited
REFUTE = a refutation pass, with its date and verdict · WOUNDED = the pass found a flaw and the entry was rewritten · BUDGETED = the pass checked the recycle-and-draw ledger · lens = the hunt that proposed it.
HAND-WALKED 2026-09-06 (docs/phase0/walks/2026-09-06-finisher-feeders.md §18), issue #161, from the CAUSE/TRIGGER matrix row 46. Card set checked first (OGN-249 + SFD-015: no exact match; the legend is in sky-splitter-volibear-free-removal, which uses neither this body nor this mechanism). Card text verbatim from data/corpus_flat.txt. Citations opened: 103.1.b.3, 161.2.b, 164.2.b, 315.1.b, 430.3, 709. The entry's contribution over the matrix row is the distinction between the two Mighty legends: 'when you PLAY a Mighty unit' needs no crossing, while 'when one of your units BECOMES Mighty' is 709's event and pays once per body forever — so the two legends want opposite decks, and only the Duelist is capped by 702.3. Trap check: no attack; no [Repeat]; no [Temporary]; no token; no recall; the channelled rune is stated as exhausted; 107.4.b does not bite, since only 107.4.c is needed.
Walked against Core Rules 2026-07-16