Professor Onyx

As of Aug 9, 2026, the cheapest tracked printing of Professor Onyx is $5.43 (PSTX #83p, Promo Pack), and the most expensive is $35.91 (STX #276, Borderless, Foil). The benchmark price (cheapest playable nonfoil) is $6.81, up 18.4% over 7 days, up 25.9% over 30 days, up 25.4% over 90 days. All-time tracked high: $9.81 (2024).

Professor Onyx has 5 tracked printings across 3 sets, in nonfoil and foil finishes, including borderless, promo pack and prerelease treatments.

PSTX #83p Promo Pack

$5.43

CK $7.49 / $3.10 43%

MP $4.89 9 avail

DSC #153

$5.75 +6%

CK $7.99 / $4.00 30%

MP $5.31 66 avail

PSTX #83p Promo Pack Foil

$6.32 +16%

CK $10.99 / $4.40 30%

MP $9.11 4 avail

STX #83 Foil

$6.71 +24%

CK $11.99 / $4.80 28%

MP $8.07 10 avail

STX #83

$6.81 +25%

CK $7.49 / $3.10 54%

MP $5.19 45 avail

STX #276 Borderless

$11.68 +115%

CK $13.99 / $5.75 51%

MP $9.37 39 avail

PSTX #83s Prerelease Foil

$17.52 +223%

CK $22.99 / $13.50 23%

MP $15.23 3 avail

STX #276 Borderless Foil

$35.91 +561%

CK $54.99 / $27.50 23%

MP $28.60 7 avail

Card Kingdom currently pays $27.50 cash for STX #276 (Foil); the retail-buylist spread on that printing is 50% (wide).

• Apr 16, 2021 Each magecraft ability has a different effect, although they all have the same trigger condition, whenever you cast or copy an instant or sorcery spell.
• Apr 16, 2021 For example, if you control Archmage Emeritus and cast an instant or sorcery spell, Archmage Emeritus's magecraft ability will trigger and you will draw a card.
• Apr 16, 2021 If an effect creates a copy of an instant or sorcery spell, this will also cause the magecraft ability to trigger.
• Apr 16, 2021 If an effect creates multiple copies of an instant or sorcery spell, magecraft abilities trigger once for each copy created by the effect.
• Apr 16, 2021 Some effects instruct you to copy an instant or sorcery card in a zone other than the stack. These copies do not cause magecraft abilities to trigger. However, most effects that do this also allow you to cast the copy, and casting the copy will cause magecraft abilities to trigger.

Professor Onyx has been reprinted 8 times. The Duskmourn: House of Horror Commander reprint cut the price 67% in 30 days.

Set	Date	Rarity	Treatment	Price before	Day 1	30 days	90 days
DSC #153	2024-09-27	Mythic	Standard	$3.08	$1.57	$1.02	$1.20
PSTX #83s	2021-04-23	Mythic	Prerelease	—	—	—	—
STX #276	2021-04-23	Mythic	Borderless	—	—	—	—
STX #276	2021-04-23	Mythic	Borderless	—	—	—	—
PSTX #83p	2021-04-23	Mythic	Promo Pack	—	—	—	—
PSTX #83p	2021-04-23	Mythic	Promo Pack	—	—	—	—
STX #83	2021-04-23	Mythic	Standard	—	—	—	—
STX #83	2021-04-23	Mythic	Standard	—	—	—	—

Professor Onyx is the #2,376 most-played card on EDHREC, down 18 places over the last 30 days.