![Mausoleum Secrets (Promo Pack) [Guilds of Ravnica Promos]](https://cdn.shopify.com/s/files/1/0451/3388/9694/files/09b8b9e0-2976-5210-bcc7-540c5be4dcf1.jpg?v=1720070947)
Mausoleum Secrets (Promo Pack) [Guilds of Ravnica Promos]
| Set: | Guilds of Ravnica Promos |
| Type: | Instant |
| Rarity: | Rare |
| Cost: | 1B |
| Colors: | B |
Undergrowth — Search your library for a black card with mana value less than or equal to the number of creature cards in your graveyard, reveal it, put it into your hand, then shuffle.