Cheapest priced copy (Shadows over Innistrad): $0.35 at Card Kingdom, near mint, their price list as of .
Sinister Concoction 
Enchantment · Uncommon · Shadows over Innistrad · #135
{B}, Pay 1 life, Mill a card, Discard a card, Sacrifice this enchantment: Destroy target creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shadows over Innistrad | 135 | Uncommon | $0.35 | $0.79 |
One ruling from Wizards of the Coast
- 8 April 2016You may pay Sinister Concoction’s costs in any order. However, once you’ve decided to activate the ability and you’ve seen the top card of your library, you can’t change your mind.