Cheapest priced copy (Ice Age): $0.35 at Card Kingdom, near mint, their price list as of .
Post's Sigil 
Leshrac's Sigil
Enchantment · Rare · Secret Lair Drop · #1188
Whenever an opponent casts a green spell, you may pay {B}{B}. If you do, look at that player's hand and choose a card from it. The player discards that card.
{B}{B}: Return this enchantment to its owner's hand.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ice Age | 144 | Uncommon | $0.35 | — |
| Secret Lair Drop (Post's Sigil) | 1188 | Rare | $2.99 | $2.49 |