In Tarkir: Dragonstorm collector boosters (12 packs per box), you can expect about 0.120 halo foil cards per box - roughly 0.0100 per pack. That works out to a 11.3% chance of pulling at least one halo foil card per box, or about 1 in 9 for your first hit. The chase end is often Ugin, Eye of the Storms (about 1 in 84 for that specific printing).
Halo foil on Universes Beyond and special releases.
Per-printing expected pulls and odds of at least one per box.
| Card | Price | Expected / box | P(≥1) | 1 in N boxes |
|---|---|---|---|---|
Ugin, Eye of the Storms #409 · mythic | $360 | 0.012 | 1.2% | 1 in 84 |
Elspeth, Storm Slayer #411 · mythic | $299 | 0.012 | 1.2% | 1 in 84 |
Craterhoof Behemoth #414 · mythic | $257 | 0.012 | 1.2% | 1 in 84 |
Dracogenesis #412 · mythic | $126 | 0.012 | 1.2% | 1 in 84 |
Clarion Conqueror #410 · mythic | $83.75 | 0.012 | 1.2% | 1 in 84 |
All-Out Assault #415 · mythic | $39.99 | 0.012 | 1.2% | 1 in 84 |
Sarkhan, Dragon Ascendant #413 · mythic | $37.00 | 0.012 | 1.2% | 1 in 84 |
Narset, Jeskai Waymaster #417 · mythic | $25.19 | 0.012 | 1.2% | 1 in 84 |
Death Begets Life #416 · mythic | $17.00 | 0.012 | 1.2% | 1 in 84 |
Skirmish Rhino #418 · mythic | $12.20 | 0.012 | 1.2% | 1 in 84 |