Combo · ENGINE

A nine Might body makes Sky Splitter cost zero — 356.6 is the floor, and the Power is the only thing left to pay

6 cards · fury + body · verified

Pieces

• Sky Splitter ×3 OGN-014 · engine · fury

  [Action] (Play on your turn or in showdowns.) This spell's Energy cost is reduced by the highest Might among units you control. Deal 5 to a unit at a battlefield.

• Volibear, Furious ×1 OGN-041 · enabler · fury

  [Deflect 2] (Opponents must pay 2 Power of any domain to choose me with a spell or ability.) When I attack, deal 5 damage split among any number of enemy units here.

• Relentless Storm ×1 OGN-249 · legend · 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.)

• Kadregrin the Infernal ×1 OGN-038 · enabler · fury

  When you play me, draw 1 for each of your [Mighty] units. (A unit is Mighty while it has 5+ Might.)

Payoff

Deck

• Legend domains must cover Fury and Body; eleven legends do, and Relentless Storm is the one this line wants.
• The whole line is gated on landing a 9 Might unit: 10 Energy + 2 Power for Volibear, 9 Energy + 2 Power for Kadregrin.

Prerequisites

• 356.6 IS THE FLOOR AND IT IS THE ONLY REASON THIS IS NOT NEGATIVE: 'Energy and Power costs can't be reduced below 0.' With a 9 Might unit on the board, Sky Splitter's E8 is reduced by 9 and lands at 0. THE POWER IS UNTOUCHED: the reduction says 'this spell's ENERGY cost', so the 1 Power is still paid every time. A repeatable 5 damage for one Power.
• THE REDUCTION IS READ WHEN THE SPELL IS PLAYED, WHICH IS THE RISK THE HUNT NAMED AND IT IS REAL. 'The highest Might among units you control' is a cost calculation, so it happens at the moment of playing; if the 9 Might body dies first, the next Sky Splitter costs 8 Energy again. The entry's price of 0 Energy is conditional on the body being alive, and that is stated rather than assumed.
• IT KILLS EXACTLY WHAT IT SAYS. 'Deal 5 to a unit at a battlefield' — 710 evaluates units on the board by their CURRENT Might, so this kills anything at 5 Might or less standing at a battlefield, and nothing at the base.
• RELENTLESS STORM CHANNELS EXHAUSTED, WHICH IS NEXT TURN'S POWER, NOT THIS TURN'S ENERGY. 'You may exhaust me to channel 1 rune exhausted' — the rune arrives already exhausted, so it adds nothing to the current Main Phase; what it adds is a permanent rune on the board. The exhaust is in the cost, so it is one rune per turn, and 415.3.a gives the legend back at the Awakening Phase.
• MEASURE IT AGAINST THE FREE FLOOR, NOT AGAINST ZERO. Every deck already gets 2 Power a turn for nothing (164.2.b's 'Recycle this: [Reaction] — Add [C]' has no exhaust in its cost, 161.2.b sends the rune to the Rune Deck, and 315.3.b / 430.4.a channel 2 back each Channel Phase). So a Sky Splitter a turn is inside the floor: the line costs no Energy and no card the deck was not going to have. CORRECTED 2026-10-24 (#456): not at the next Channel Phase. 416.1 puts a recycled rune on the bottom of the Rune Deck (416.1.b) and 430.1 channels from the top, so 315.3.b's two a turn are the runes above it, which the board gets whether or not anything was recycled. With only those two a turn (161.2.a, 315.3.b, 485.7), a rune recycled on any of T1 to T6 is back on T7 going first; going second the first one recycled by T5 is back on T6 and the second on T7; each two more recycled push it a turn later, and a card that channels more (430.2) brings it back sooner. Only once the Rune Deck is empty (all twelve out, T6 at the earliest from either seat) does the next Channel Phase give a recycled rune back; before that a recycle is a rune short on every turn until the deck runs dry, and two recycled every turn hold the board flat at two going first. So a Sky Splitter a turn is inside the rate that keeps the board flat, but it is not free before the Rune Deck is empty: each Power it costs is a rune short on every turn until the deck runs dry. The card cost is still zero; the Energy is not, from the next turn on. Status unchanged: the 356.6 floor this entry is about does not move.
• KADREGRIN IS THE SAME BODY WITH A CARD RIDER. Both are M9; Kadregrin costs 1 Energy less and draws 1 for each of your [Mighty] units on the play, Volibear brings [Deflect 2] and a 5 damage split on the attack. Kadregrin is already in gemdragon-henge-vi-blind-fury and pridestalker-mighty-draw; Volibear, Sky Splitter and Relentless Storm are in no entry at all, which is why they are the named ingredients.
• OGN-250 STORMBRINGER IS THE OTHER HALF OF THIS BOARD AND IT BELONGS TO ANOTHER ENTRY. 'Choose a friendly unit in your base. Deal damage equal to its Might to all enemy units at a battlefield, then move your unit there' — with a 9 Might body that is a wipe followed by a landing, and because both happen inside ONE resolution the enemies are gone before your unit arrives, so 323.9 ('Mark a Combat as Staged at each Battlefield … that have Units present controlled by OPPOSING players') never stages a Combat and 466.5.d / 348.2.a.1 give the Conquer with no damage step. That is #58's axis reached from the damage side. confront-vi-stormbringer already runs the spell, so this entry names it here instead of claiming it.
• THE CEILING IS THREE SPELLS. 103.2.b caps Sky Splitter at 3 and each copy is consumed; nothing in the line returns a spell from the trash.
• A SPLIT IS N CHOICES, SO IT PAYS THE [DEFLECT] TAX ONCE PER BODY — AND THIS ENTRY IS PRICED WITHOUT IT (upgrade 2026-09-12, #187 batch 28). **355.14.a** — *"If a card specifies that an amount of damage may be split among some number of Units, then each Unit chosen is Targeted"* — with **355.14.d**, *"Each Target is valid, and contributes to Targeting Effects individually"*, cited once and zero against 355.14.h`s sixteen. Read with 809.1.c, which charges Power equal to the Deflect Value *"for each time they choose"*: **47 printings carry Deflect, and 187.7 gives it to a Bird token BY RULE**, so `UNL-044 Flurry of Feathers` — four Birds at [Reaction] speed — taxes an incoming split **four rainbow**. 355.14.c caps targets at the damage available and permits taking fewer, so the mitigation is to spread LESS: Deflect converts a split from a free spread into a rainbow per body. **It reaches the trigger and not only the spell** (809.1.c and 809.1.d both say *"spells and abilities"*), and batch 21`s asymmetry then bites: the tax is paid at step 404, where 404.2 lets you DECLINE — and declining removes the whole trigger, so against a Bird garrison it is pay-per-body or nothing.

Steps

1. Land a 9 Might unit: Volibear, Furious for 10 Energy + 2 Power, or Kadregrin the Infernal for 9 Energy + 2 Power.
2. Relentless Storm sees a [Mighty] unit played: exhaust it to channel 1 rune exhausted, once per turn.
3. With that body alive, play Sky Splitter: its E8 is reduced by 9, and 356.6 stops the cost at 0. Pay the 1 Power.
4. Deal 5 to a unit at a battlefield — enough for anything at 5 Might or less (710).
5. Repeat next turn with the next copy while the big body lives. If it dies, Sky Splitter costs 8 Energy again.

Per iteration

5 damage to a unit at a battlefield for 0 Energy and 1 Power, once per copy, for as long as a 9 Might unit is on the board

How it ends

engine only — three Sky Splitters, each consumed, and the discount dies with the body that grants it

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

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