Combo · ENGINE

Two bodies that grow per spell PLAYED, and a replay from the trash is a second play of a card already spent

3 cards · mind + chaos · verified

Pieces

• Ravenbloom Student ×1 OGN-103 · payoff · mind

  When you play a spell, give me +1 Might this turn.

• Diana, No Longer Human ×1 UNL-149 · payoff · chaos

  [Ambush] (You may play me as a [Reaction] to a battlefield where you have units.) When you play a spell, give me +2 Might this turn.

• Fizz, Trickster ×1 SFD-140 · engine · chaos

  When you play me, you may play a spell from your trash with Energy cost no more than 3 Energy, ignoring its Energy cost. Then recycle it. (You must still pay its Power cost.)

Payoff

Deck

• Mind + Chaos. Computed over the 94 legend base codes in cards.json: OGN-263 / OGN-307 Swift Scout (Teemo), SFD-199 / SFD-248 Prodigal Explorer (Ezreal), UNL-197 / UNL-234 Scorn of the Moon (Diana), VEN-151 / VEN-195 Soul's Reflection (Mel). Nothing here is Signature, so all four names are open (103.2.d.2).
• Spells you were going to cast anyway. The line adds no spell of its own — it prices the ones already in the deck.

Prerequisites

• +N MIGHT THIS TURN IS NOT A BUFF, WHICH IS THE WHOLE REASON THESE STACK. 702.3 — 'There can only be one Buff on a Unit at a time' — and 702.3.a govern the 702 counter, and 703 fixes each Buff at exactly +1. Neither card places a counter: 'give me +1 Might this turn' is a plain continuous modifier applied in 477.3.e.1's increase step, so a second, third and fourth instance all apply and there is no cap of any kind. Every buff-doubling trap in the catalogue is silent here.
• THE REPLAY IS A SECOND 'YOU PLAY A SPELL' EVENT OFF A CARD ALREADY SPENT, AND THAT IS THE RULE'S CLAIM MEASURED. Fizz, Trickster plays a spell from your trash 'ignoring its Energy cost' — the spell was paid for once, went to the trash, and now fires both triggers again for the price of a body you wanted anyway. 350.1 makes a card Played when the process finishes, so the trigger reads a genuine play. The same shape is printed on 17 [Flow] cards: 829.1.b is 'functionally short for "You may play this from your trash for its flow cost. Then banish it"', so each copy is worth exactly TWO events over a game, and 829.1.b.1's delayed replacement banish is the cap.
• THE ARITHMETIC, WITH THE QUANTITIES DECLARED. A turn in which you cast three spells and then play Fizz, whose trigger replays a fourth from the trash, is four 'you play a spell' events. Ravenbloom Student goes from M2 to M6 and Diana, No Longer Human from M3 to M11 — a summed Might of 17 across two bodies that cost E2 and E4 + 1 Chaos Power. 465.2.c reads that sum when the damage is assigned.
• DIANA ARRIVES INSIDE THE FIGHT. 822.1.b makes [Ambush] 'functionally short for "I may be played to a battlefield where you control Units" and "I have [Reaction] as long as I'm being played to a battlefield where you control Units"', and 822.1.c adds the location during the Make Relevant Choices step of playing. So she can be played as a [Reaction] into a Combat's Closed State (813.1.c.1, 312.2.c) at a battlefield you already garrison — a body entering mid-combat takes the Defender designation at the next Cleanup, before 465.2 resolves (319.6, 323.2.a) — and every spell cast in that same Closed State then grows her by 2.
• WHAT THE MIGHT IS FOR, STATED PLAINLY. Nothing in Mind/Chaos converts Might into points: the excess-damage family is Fury and Body (OGN-034, SFD-120, UNL-187, UNL-188, UNL-217), so this line's product is a combat it wins and a battlefield it takes, never a burst. That is why it is ENGINE and produces conquer-engine, and why the pairing with an excess-damage payoff is refused rather than left implied — 103.1.b would need a third domain.
• WHAT REFUTES IT. (a) Every point of Might expires at end of turn, so the two bodies defend at printed size on the opponent's turn — M2 and M3, both of which die to almost anything. (b) Fizz's replay is capped at Energy cost 3 or less and still charges the spell's Power cost, so the free half is Energy only. (c) The triggers read SPELLS: a token played, an ability activated and a unit cast are all worth nothing (350.2 and 185.2.a keep a token out of any 'played a card' clause, and a unit is not a spell). (d) 103.2.b caps each of the three at three copies, but a second Ravenbloom or Diana grows separately rather than faster — the rate per body is fixed.

Steps

1. Earlier turn: play Ravenbloom Student (E2). 143.4 makes her enter exhausted; 315.1.b readies her.
2. Main Phase of the payoff turn: cast the spells the deck was going to cast anyway. Each one gives Ravenbloom +1 Might this turn (477.3.e.1).
3. Play Diana, No Longer Human (E4 + 1 Chaos Power), either normally or as a [Reaction] to a battlefield where you already have units ([Ambush], 822.1.b / 822.1.c). From that point every spell gives her +2 as well.
4. Play Fizz, Trickster (E3 + 1 Chaos Power). His trigger plays one spell from your trash of Energy cost 3 or less, ignoring its Energy cost — you still pay its Power cost — and then recycles it to the bottom of your Main Deck (416.1.a).
5. That replay is a fourth 'you play a spell' event: Ravenbloom is M6 and Diana is M11.
6. Attack, or defend, with a summed Might of 17 that cost two Energy and one card more than the turn was going to cost anyway. 465.2.c reads the sum at assignment.

Per iteration

+1 and +2 Might per spell played, uncapped, with one of the spells played for free out of the trash — a 17-Might board on an ordinary four-spell turn

How it ends

engine only — every modifier expires at end of turn, nothing in Mind/Chaos converts Might into points, and Fizz's replay is one per copy

Sources

Published elsewhere

• Riftbound Core Rules, Last Updated 2026-07-16 (data/Riftbound-Core-Rules-2026-07-16.txt) 2026-07-16

Walked here, in this project

• Synergy rule ravenbloom-student-spell-replay (data/synergies.json) 2026-09-06
• Hand walk 2026-09-07 (docs/phase0/walks/2026-09-07-rules-second-pass.md), issue #170 2026-09-07 record

Walked against Core Rules 2026-07-16

Match a deck list against the whole catalogue