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Rookie Mistake
Core Set 2021 (M21) · #66 · common · mtg
Instant
Until end of turn, target creature gets +0/+2 and another target creature gets -2/-0.
DeckSpec Pricei
Non-foil$0.04
Foil$0.16
Condition
Weighted composite · smoothed against one-off swings.
Current prices
Condition
FoilNM
| cardkingdom | $0.49 | 2026-07-24 |
| Cardmarket | ≈$0.12 | 2026-08-08 |
| TCGplayer | $0.23 | 2026-08-08 |
Non-foilNM
| cardkingdom | $0.35 | 2026-07-24 |
| Cardmarket | ≈$0.06 | 2026-08-08 |
| MTGO | ≈$0.03 | 2026-08-08 |
| TCGplayer | $0.03 | 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.
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