Unholy Grotto (Onslaught) — Market vs Foil: which is worth more?
Unholy Grotto (Onslaught) value — Market $6.36 vs Foil $58.00. Foil sells for 9.12× Market (+812%). Prices updated August 2026.
Medians of real sold listings per condition, updated August 2026 — how we compute values.
Market vs Foil
$6.36→$58.00
Foil sells for 9.12× (+812%) the Market price — a $51.64 difference per card.
Is complete worth it?
Foil $58.00 vs Market $6.36 — a $51.64 premium (+812%). If you're holding the box and manual, completing a loose copy pays when that premium beats what the missing pieces cost you.
Values are estimates from real sales data — not appraisals or offers. Some links earn JunkPal a commission at no cost to you (disclosure).