SRlow confidence
~4 per 16-pack box
Basis: anecdote (single-collector reports quoted in community guides); no large-sample data found source →
Snapshot as of 2026-07-23 · every rate carries its basis — estimates are estimates
Does the publisher tell you the odds?
No. Official NA product pages list only titles, dates and $4.99 pack MSRP; no configuration odds.
Union Arena
Guaranteed slots: 1 foil card per pack per community guides; no official slot documentation
The family outlier: smaller 8-card packs and 16-pack IP-licensed boxes (Jujutsu Kaisen, Hunter x Hunter, Demon Slayer, etc.). EN launched Sep 2024 with '1st edition' stamped printings. Same no-odds policy as the rest of the family.
Confidence is part of the data: a low-confidence range is an honest answer, a precise-looking number without a basis is not.
~4 per 16-pack box
Basis: anecdote (single-collector reports quoted in community guides); no large-sample data found source →
~1 per box
Basis: anecdote/community consensus ('boxes reliably deliver starred cards') source →
~1 per case
Basis: anecdote in community guide source →
rarer than AP foils, i.e. sub-1-per-case; no sampled numbers exist publicly
Basis: anecdote in community guide source →
3-star (★★★) chase parallels
Top alt-art foil tier added in newer sets; functions as the set's case-hit-level chase
Approximate frequency: under 1 per case (anecdote, low confidence)
Sets: newer UA sets (2025+)
No god packs / no serialized cards
No god-pack or serialized mechanic documented for Union Arena in any source reviewed
Approximate frequency: n/a
Rates drift between sets, print waves, and regions; where our sources disagreed we kept the disagreement visible instead of averaging it away. Nothing on this page is investment or purchase advice — it exists so you know what a box is before you buy one.
Machine-readable twin: /api/v1/pulls · snapshot 2026-07-23