Spell
NormalTime Stream
Archetype:
Fossil
View:
4158
Target 1 "Fossil" Fusion Monster you control; Tribute it, and if you do, Special Summon 1 "Fossil" Fusion Monster from your Extra Deck, whose original Level is 2 higher than that monster's. (This is treated as a Fusion Summon with "Fossil Fusion".) During your Main Phase, except the turn this card was sent to the GY: You can banish this card and 1 "Fossil" Fusion Monster from your GY, then target 1 "Fossil" Fusion Monster in your GY; Special Summon it.
Time Stream — Power Evaluation
Final Score: 47 ± 8 · Confidence: Medium
- Intrinsic: 45 · Deck: 48 · Meta: provisional
- Primary role: Extender · Secondary: Recovery/Recursion
Why it scores here
Time Stream converts a Fossil Fusion monster already on the field into a higher-Level Fossil Fusion from the Extra Deck, and its Main Phase GY effect revives a Fossil Fusion, so it is a real extension and recursion piece inside one archetype. Its score comes from the 111-deck sample (88% Fossil gameplay, 100% co-occurrence with Fossil Fusion) and the GY route, not from its effect count or the high-Level outcome. It has no interaction, the Tribute and banish costs are real, and the archetype lock is a deckbuilding cost, so the score stays in the middle band.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 55 | Live in 111 of 111 sampled decks, but only once a Fossil Fusion is already on the field or in the GY, with no combo boards supplied to confirm the starter route (observed deck stat, inferred route). |
| Combo & Conversion | 55 | Text converts one Fusion into a Level+2 Fusion, a clear extension, but combos_evidence is empty so the conversion depth is text-only inference (inferred). |
| Resource Economy | 45 | Tribute-then-summon is roughly even on the field, while the GY effect spends itself plus one GY card to recover one body, so net advantage is modest (verified text, inferred net). |
| Effect & Interaction | 5 | No opponent-facing negation, removal, or disruption in the text (verified). |
| Material Utility | 20 | A Spell with no body of its own, so its value as material is minimal (verified text). |
| Resilience & Flexibility | 55 | The GY effect works from the graveyard and it is used across Main Phases, giving some recovery after a response (verified text, inferred resilience). |
| Deck-Building Efficiency | 40 | Archetype-locked and needs a Fossil Fusion target, averaging 1.69 copies per deck, so it is a restricted slot outside Fossil homes (observed deck stat, inferred cost). |
Calculation
Weight profile: 0.7 Extender + 0.3 Recovery/Recursion. Intrinsic ≈ 45, Deck ≈ 48, Meta = provisional. Modifiers: Archetype-locked self-restriction (-3). Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Extends a Fossil Fusion into a higher-Level Fossil Fusion from the Extra Deck, which fits the Fossil Fusion engine
- GY effect recovers a Fossil Fusion from the graveyard in the Main Phase
- Present in 111 of the sampled decks, with 100% co-occurrence with Fossil Fusion and Fossil Warrior Skull King
Weaknesses
- Archetype-locked: needs a Fossil Fusion target and does nothing in other homes
- No opponent interaction and no body of its own
- No combo boards in the evidence, so its conversion depth is unverified
Counters / choke points
- Generic spell-speed responses to its activation (inferred; no interaction data supplied)
- Stopping the Fossil Fusion target before the effect resolves (inferred from the target requirement)
Best use
Extender. Decks: Fossil. Suggested copies: 2.
Evidence & gaps
- Verified: Text: Tribute a Fossil monster to Special Summon a Fossil Fusion of Level 2 higher; GY effect banishes itself and one Fossil Fusion to revive a Fossil Fusion; Decks: 111 sampled, 88.3% Fossil gameplay, 100% co-occurrence with Fossil Fusion; Copies per deck: average 1.69, max 3
- Observed: Partner co-occurrence: Fossil Warrior Skull King 100%, Fossil Fusion 100%, Weathering Soldier 98.2%
- Inferred: Starter route is a Fossil Fusion already on the field; no combo boards confirm it; Resilience from GY recursion; Archetype lock is a deckbuilding cost
- 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 deck sample only