Cheapest priced copy (The Lost Caverns of Ixalan): $2.99 at Card Kingdom, near mint, their price list as of .
Malcolm, Alluring Scoundrel 
Legendary Creature — Siren Pirate · 2/1 · Rare · The Lost Caverns of Ixalan · #293
Flash
Flying
Whenever Malcolm deals combat damage to a player, put a chorus counter on it. Draw a card, then discard a card. If there are four or more chorus counters on Malcolm, you may cast the discarded card without paying its mana cost.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $2.99 to $6.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan | 63 | Rare | $2.99 | $4.49 |
| The Lost Caverns of Ixalan | 293 | Rare | $2.99 | $4.49 |
| The Lost Caverns of Ixalan Promos | 63p | Rare | $4.49 | $5.99 |
| The Lost Caverns of Ixalan Promos | 63s | Rare | — | $6.49 |
5 rulings from Wizards of the Coast
- 10 November 2023If you cast a spell using Malcolm, Alluring Scoundrel's last ability, you do so as part of the resolution of the ability. You can't wait to cast the spell later in the turn. Timing permissions based on the card's type are ignored.
- 10 November 2023If you cast a card "without paying its mana cost", you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, you must pay those to cast the card.
- 10 November 2023You may not play land cards discarded with Malcolm, Alluring Scoundrel's last ability.
- 10 November 2023If Malcolm, Alluring Scoundrel isn't on the battlefield as its triggered ability resolves, you won't put a chorus counter on it, but you'll still draw a card and discard a card. You may still cast the discarded card without paying its mana cost if Malcolm had four or more chorus counters on it when it was last on the battlefield.
- 10 November 2023If the spell has {X} in its mana cost, you must choose 0 as the value of X.