Two Legends Booster Box EV Calculator

Best Evidence — Japanese collation proxy

Evidence

This calculator is based on Best Evidence — Japanese collation proxy reviewed September 4, 2026.

Sources

• Two Legends [OP-08] official English product page - Bandai Co., Ltd. (accessed 2026-09-03)
• TCGCSV category 68 group 23462, sealed product 542504 - TCGCSV (accessed 2026-09-03) — identity and pricing were imported into local generated artifacts; the calculator does not call the raw endpoint.
• Best Evidence — Japanese collation proxy and ordinary-pool classification - The Expected Value (accessed 2026-09-04)
• Japanese OP-08 product contents - Bandai Co., Ltd. (accessed 2026-09-04)
• Double Pack Set Volume 5 separate DON!! bonus - Bandai Co., Ltd. (accessed 2026-09-04)
• Japanese OP-08 box inclusion pattern (secondary estimate) - Toreca Begin (accessed 2026-09-04)
• English OP-08 regular Super Rare and premium-hit discussion - Reddit community observation (accessed 2026-09-04)
• English OP-08 two-DON!! box observation - Reddit community observation (accessed 2026-09-04)

Limitations

• collation.cardsPerPack and collation.packsPerProduct: the product uses 12 cards per pack and 24 packs per English booster box; those physical wrapper counts do not establish rarity-slot probabilities.
• collation.caseStructure: box-level hit counts and display/case correlations are unresolved for the exact English North America printing.
• evidence.sample: null because no reviewed observation provides a complete, attributable sample with exact unit, size, method, North America printing, and observation interval.
• pricing.coverage: exact TCGCSV identity is known, but modeled row and expected-mass coverage have not been measured.
• Modeling policy approved 2026-09-04: every supported ordinary card in the same slot, rarity, treatment, and finish pool receives one equal positive selection weight. This is a transparent modeling assumption where the publisher or empirical sample gives pool odds but not card-level sheet weights.
• Best Evidence — Japanese collation proxy: exact English wrapper and card-price identities are combined with an owner-approved Japanese-product collation proxy because a complete English rate ledger is not published. This is an estimate, not a factory guarantee.
• Only booster-pack slot counts and rarity probabilities are proxied. Card identities, treatments, TCGplayer Low prices, sealed-product identity, language, region, release date, and any explicitly modeled fixed bonus come from the exact English release.
• The proxy is first-order and product-family-specific. No display or case correlation is inherited, and no target is used as a donor for another target.
• Within each retained English rarity/treatment pool, exact positively priced card SKUs use equal positive weight where publisher sheet weights are unavailable.
• Per 24-pack English OP-08 box proxy: 166 Common, 64 Uncommon, 39 Rare, 8 Leader, 7 Super Rare, 2 retained Secret Rare, and 2 parallel DON!! cards, totaling 288 modeled physical cards. This is an assumed no-chase marginal ledger, not an exact observed English box or factory guarantee.
• Replace this proxy when a complete, attributable English collation ledger or publisher rate table becomes available for the exact release.
• Bandai's English OP-08 roster lists 126 game-card types plus one DON!! type. All 119 ordinary identities are retained: 45 Common, 30 Uncommon, 26 Rare, 6 Leader, 10 Super Rare, and 2 Secret Rare. Six Special cards, the English Treasure Rare, manga, and other unsupported game-card parallels are removed before drawing.
• The Japanese OP-08 product contains six-card packs. Its reviewed secondary box-pattern estimate reports about four Leaders, three to four Super Rares, zero to one Secret Rare, premium parallel branches, and one parallel DON!! per 24-pack box. The source explicitly states that it compiled online information rather than conducting a controlled opening; no exact sample or published factory rates are claimed.
• English OP-08 community reports corroborate seven regular Super Rares, two or three premium hits, and two DON!! per box. The model uses eight Leaders and seven Super Rares after scaling the Japanese wrapper, with two retained high-hit positions conditioned onto regular-art Secret Rares as an explicit modeling assumption. It does not claim two raw regular Secret Rares per English box or model the additional premium branch's frequency.
• The two booster DON!! cards use exact English TCGplayer product 577568 and its Foil Low price. Products 576484 and 576485 are the two separate Double Pack Set Volume 5 bonus designs and are excluded from the booster box. No Box Topper, Revision Pack, or purchase-campaign bonus is added.
• No reviewed OP-08 evidence establishes a thirteenth physical card in DON!! packs. To preserve the advertised 24 twelve-card boosters, the two DON!! outcomes replace two Common positions as an explicit marginal-position assumption. The exact replaced rarity and pack correlation are unresolved; embedded pack EV includes the average 2/24 DON!! contribution and all 288 modeled cards contribute to box EV.
• Commons, Uncommons, and retained hit-pool cards use equal positive SKU weights within each pool. These first-order expected counts do not impose exact per-box rarity totals, no-duplicate rules, pack assignments, or case covariance. Unsupported outcomes are removed before drawing; Sift and other user filters run only after the complete product draw.
• No-chase redraw policy approved 2026-09-04: Curio, Enchanted, alternate-art, parallel, showcase, serialized, signature, premium-rarity, promotional, and any other card or treatment without a supported pull rate are excluded. A chase hit is redrawn from the applicable supported ordinary pool, so excluded cards occupy no modeled outcome.
• Simulation ordering is draw the complete disclosed no-chase product first, record that draw, and only then apply Sift or another user filter. Sift never changes or backfills the completed modeled draw.