Fortissimo
Spell Continuous

Fortissimo

  • Archetype:
  • Melodious

  • View:
  • 3861




Once per turn: You can target 1 "Melodious" monster you control; it gains 800 ATK until your next Standby Phase (even if this card leaves the field). You can send this card to the Graveyard; Fusion Summon 1 "Melodious" Fusion Monster from your Extra Deck, using monsters you control as Fusion Materials.




 
 
AI Power Analysis
Combo enablerConfidence: MediumEvaluated Oct 9, 2026
54± 8/ 100
Power Score
Intrinsic 52
Deck 56

Fortissimo — Power Evaluation

Final Score: 54 ± 8 · Confidence: Medium

  • Intrinsic: 52 · Deck: 56 · Meta: provisional
  • Primary role: Combo enabler · Secondary: Extender

Why it scores here

Fortissimo converts the Melodious engine into a Fusion Summon from the Extra Deck by sending itself to the Graveyard, and its +800 ATK buff on a Melodious monster persists even if it leaves the field. Its score comes from that conversion, its cheap slot cost, and its presence in all 26 sampled decks alongside the core Melodious partners. The card's ATK boost and Spell typing earn almost nothing on the material axis, and there is no combo or guide evidence to show how far the Fusion line goes in practice.

Axis scores

Axis Score Evidence
Accessibility 55 Main-deck Continuous Spell running 2.04 copies on average in 26 of 26 decks, but no searcher or combo-start data is supplied to confirm how reliably it is drawn (observed deck count; inferred access).
Combo & Conversion 60 Text gives one Fusion Summon from the Extra Deck using monsters you control, a real body gain, but no combo boards show its typical end-state (verified text; no combo data).
Resource Economy 55 Costs itself to the Graveyard and returns one Fusion Monster from the Extra Deck, roughly even card economy with a temporary ATK buff and no recursion (verified text; inferred balance).
Effect & Interaction 5 No negation, removal, or hand-trap effect in the text (verified).
Material Utility 8 A Spell card, so it is never Fusion material and the score can only come from the buff; the Fusion monster it produces is a separate card (verified text; inferred).
Resilience & Flexibility 50 The ATK buff outlasts the card leaving the field, but the card's own Graveyard effect is not stated to be usable from hand, so its route is unclear (verified text; inferred).
Deck-Building Efficiency 80 Three copies at most, no garnet, lock, or splash cost, and it co-occurs with the core Melodious partners in every sampled deck (observed deck stats).

Calculation

Weight profile: 0.7 Starter/Combo enabler + 0.3 Extender. Intrinsic ≈ 52, Deck ≈ 56, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

  • Fusion Summon from the Extra Deck that uses the Melodious monsters already on the field
  • The +800 ATK buff keeps working after the card leaves the field
  • Runs in every sampled deck with the core Melodious partners at high co-occurrence
  • Cheap slot cost with no garnet or lock requirement

Weaknesses

  • Restricted to Melodious monsters, so it has no value outside that archetype
  • No combo, searcher, or guide evidence to confirm how often it is the starter
  • Its material value is negligible because it is a Spell
  • Little interaction: no negation, removal, or disruption

Counters / choke points

  • No specific counters are named in the supplied evidence; generic Spell removal and monster-effect negation would stop the Fusion line

Best use

Combo enabler: converts the Melodious board into a Fusion Summon and extends ATK. Decks: Melodious (archetype 817), Melodious (archetype 1407). Suggested copies: 2.

Evidence & gaps

  • Verified: Continuous Spell, archetype Melodious, legal in TCG, OCG, MasterDuel and DuelLinks; Once per turn ATK buff of +800 to a Melodious monster until the next Standby Phase, persisting after the card leaves the field; Can be sent to the Graveyard to Fusion Summon one Melodious Fusion Monster from the Extra Deck using monsters you control as materials; Present in 26 of 26 sampled decks at an average of 2.04 copies
  • Observed: Melodious archetype 817 is in 69.2% of the sampled decks; Core Melodious partners co-occur at 76.9% to 100% of the decks that run this card; Played in 3 gameplay types, with 76.9% in gameplay type 7
  • Inferred: Accessibility depends on draw, since no searcher is supplied; Graveyard cost and Fusion Summon net to roughly even card economy; Its Graveyard effect is assumed to be usable from the field, not stated in the text
  • Data gaps: no combos supplied; combo conversion is text-only inference no guides supplied no banlist token; assumed 3 copies (unlimited) no usage statistics (StatisticsCard); archetype inclusion % inferred from the deck sample only no searcher or access evidence; accessibility is inferred from deck counts the text does not say from which zone the Graveyard effect can be activated











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