← #125 Wild Crocodile #127 Baron Von Count →

Buy / view

TCGplayer eBay Card Kingdom GameStop Scryfall

TCGplayer is an affiliate link — we may earn a commission, at no extra cost to you.

Willing Test Subject

Unstable (UST) · #126 · common · mtg

Creature — Spider Monkey Scientist

Reach Whenever you roll a 4 or higher on a die, put a +1/+1 counter on this creature. {6}: Roll a six-sided die.

DeckSpec Pricei

Non-foil$0.10

Foil$0.48

Condition

Weighted composite · smoothed against one-off swings.

Current prices

Condition

FoilNM

cardkingdom	$0.49	2026-07-24
Cardmarket	≈$0.48	2026-08-08
TCGplayer	$0.48	2026-08-08

Non-foilNM

cardkingdom	$0.35	2026-07-24
Cardmarket	≈$0.10	2026-08-08
TCGplayer	$0.10	2026-08-08

Non-USD sources (e.g. Cardmarket, EUR) are shown converted to USD at €1 ≈ $1.15 — indicative, not an exact quote.

Prices update daily · last checked Sun Aug 09. Indicative, not offers — how we price.

Price history (last 180 days)

Condition key

NM Near MintLP Lightly PlayedMP Moderately PlayedHP Heavily PlayedDMG Damaged

Recorded prices are Near Mint; LP–DMG are estimated from standard hobby multipliers (foils discounted more steeply) — a guide, not a market quote.

Add to collection

Finish

Condition

Quantity

Paid each (USD)

Watch price

When price

Price (USD)

Finish

Source

Cards like this

Saber-Tooth Moose-Lion

Compare Willing Test Subject vs:Scurrid Colony Skybeast Tracker Orbweaver Kumo Bounding Wolf Walltop Sentries

Complete the set — Unstable

You have 0 of 268 (0%)

Most valuable cards in this set

Urza, Academy Headmaster