Spell
FieldLost World
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All monsters on the field lose 500 ATK and DEF, except Dinosaur-Type monsters. Once per turn, if a Dinosaur-Type monster is Normal or Special Summoned (except during the Damage Step): You can Special Summon 1 "Jurraegg Token" (Dinosaur-Type/EARTH/Level 1/ATK 0/DEF 0) to your opponent's field in Defense Position. While your opponent controls a Token, they cannot target monsters on the field with card effects, except Tokens. Once per turn, if a Normal Monster(s) on the field would be destroyed by battle or card effect, you can destroy that many Dinosaur-Type monsters in your hand and/or Deck instead.
Lost World — Power Evaluation
Final Score: 62 ± 5 · Confidence: Medium
- Intrinsic: 59 · Deck: 64 · Meta: provisional
- Primary role: Floodgate/Control · Secondary: Utility
Why it scores here
Lost World locks opponent interactions via generated Tokens while providing ATK/DEF penalties and destruction redirection for your Normal Monsters. Its power lies in disruption and resource protection within Dinosaur decks rather than building raw offensive boards. The card's strong, consistent inclusion in three key Dinosaur archetypes (100% each) confirms solid accessibility and deck fit, but the absence of combo data prevents verification of true synergistic depth—it functions as a control tool, not a combo engine.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 68 | Appears in 100% of 400 Dinosaur-focused decks at 1.35 copies average, with field spell searchers in Dinosaur support improving draw consistency (observed). |
| Combo & Conversion | 32 | Zero combo appearances supplied and card text shows passive lock generation without active board extension—it supports existing Dinosaur boards rather than building from empty field (verified). |
| Resource Economy | 45 | Generates no direct card advantage through draw or search; value is purely defensive redirection of destruction effects from your Normal Monsters to your hand/Deck Dinosaurs (verified). |
| Effect & Interaction | 68 | While opponent controls Tokens, they cannot target monsters on field with card effects except Tokens, providing a strong targeting lock that disrupts effect-centric strategies (verified). |
| Material Utility | 0 | Lost World is a Field Spell with no monster body, Level, Attribute, or Type—it provides zero material value for Synchro/Xyz/Link summons (verified). |
| Resilience & Flexibility | 48 | Field Spell can be hit by field wipe or destruction effects without inherent protection; once-per-turn effect activation limits re-use frequency within a single turn (verified). |
| Deck-Building Efficiency | 72 | Requires only a field spell slot with no activation cost or deck restrictions; 100% inclusion in Dinosaur archetypes and 1.35 copies average shows clean fit without bricking concerns (observed). |
Calculation
Weight profile: Primary role: Floodgate/Control. Intrinsic ≈ 59, Deck ≈ 64, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Provides a strong targeting lock while opponent controls Tokens, blocking most card effects except Token interaction
- ATK/DEF penalty disrupts non-Dinosaur strategies and reduces threat of opposing monsters
- Protects your Normal Monsters from destruction via redirection to hand/Deck Dinosaurs
- Clean field spell with no activation cost or hand requirement
- 100% inclusion in three key Dinosaur archetypes with 1.35 copies average indicating reliable consistency
Weaknesses
- No intrinsic card advantage generation—purely defensive utility
- Requires dedicated field spell slot, competing with other field effects in deck construction
- Vulnerable to field wipes, targeted destruction, and field effect negation without inherent protection
- Once-per-turn activation limits within-turn re-use and effectiveness
- Zero material utility as a Spell Card—cannot be used for Synchro/Xyz/Link material
Counters / choke points
- Field wipe effects and field spell destruction
- Cards that negate field effects or prevent their activation
- Strategies immune to ATK/DEF penalties or that bypass Token targeting restrictions
- Decks that do not rely on targeting effects and are unaffected by the Token lock
Best use
Control/Disruption via Token lock and resource protection. Decks: Transcendosaurus, Evol, Dinowrestler, Dinos. Suggested copies: 1.
Evidence & gaps
- Verified: Lost World is a Field Spell generating Jurraegg Tokens to opponent's field in Defense Position; Generates targeting lock: opponent cannot target monsters on field with card effects while controlling Tokens; Applies 500 ATK/DEF penalty to non-Dinosaur monsters on field; Can redirect destruction from Normal Monsters to Dinosaur-Type monsters in hand/Deck instead; Appears in 100% of 400 Dinosaur-focused deck sample at 1.35 copies average; 100% inclusion in True Draco, Dinowrestler, and Dinos per usage_statistics
- Observed: 88% of running decks are gameplay type 7 (presumed combo-heavy format); Top deck partners are all Dinosaur-related staples (Souleating Oviraptor, Babycerasaurus, Miscellaneousaurus, Ultimate Conductor Tyranno); Appears across 45 distinct archetypes, indicating broad adoption within Dinosaur and Dinosaur-hybrid ecosystems; Listed in one guide under 'Core Spell' section for Dinosaur building guide; Average 1.35 copies per deck shows solid inclusion without forced redundancy
- Inferred: Field spell searchers in Dinosaur support (Fossil Dig, etc.) improve accessibility within archetype; Token-locking mechanism targets effect-heavy strategies and provides selective disruption; Synergy with Dinosaur Normal Monsters and destruction-redirection mechanics enables resource preservation; Field spell slot competition with other field effects limits true redundancy despite average copies
- Data gaps: Zero combos supplied—combo conversion and participation are text-only inference, not verified by observed combo data No banlist token provided—card assumed unlimited (standard 3-copy legal maximum) Limited guide evidence (1 guide only)—broader strategic role understanding is primarily inferred from deck evidence Top card context missing—no competitive ranking data to confirm metagame presence at highest tournament levels