In Core Set 2021 collector boosters (12 packs per box), you can expect about 9.57 borderless cards per box - roughly 0.797 per pack. That works out to a 100.0% chance of pulling at least one borderless card per box, or about 1 in 2 for your first hit. The chase end is often Grim Tutor (about 1 in 3 for that specific printing).
Borderless full-art printings in booster-fun slots.
Per-printing expected pulls and odds of at least one per box.
| Card | Price | Expected / box | P(≥1) | 1 in N boxes |
|---|---|---|---|---|
Grim Tutor #315 · mythic | $28.00 | 0.487 | 38.6% | 1 in 3 |
Ugin, the Spirit Dragon #279 · mythic | $26.45 | 0.487 | 38.6% | 1 in 3 |
Teferi, Master of Time #281 · mythic | $15.00 | 0.487 | 38.6% | 1 in 3 |
Massacre Wurm #316 · mythic | $14.43 | 0.487 | 38.6% | 1 in 3 |
Liliana, Waker of the Dead #282 · mythic | $9.99 | 0.487 | 38.6% | 1 in 3 |
Solemn Simulacrum #319 · rare | $2.00 | 0.975 | 62.3% | 1 in 2 |
Garruk, Unleashed #284 · mythic | $1.93 | 0.487 | 38.6% | 1 in 3 |
Cultivate #317 · rare | $1.89 | 2.74 | 93.6% | 1 in 2 |
Basri Ket #280 · mythic | $1.68 | 0.487 | 38.6% | 1 in 3 |
Chandra, Heart of Fire #283 · mythic | $0.80 | 0.487 | 38.6% | 1 in 3 |
Containment Priest #314 · rare | $0.67 | 0.975 | 62.3% | 1 in 2 |
Scavenging Ooze #318 · rare | $0.50 | 0.975 | 62.3% | 1 in 2 |