---
name: "Library of Leng"
mana_cost: "{1}"
cmc: 1
type_line: "Artifact"
colors: []
color_identity: []
keywords: []
set: "LEA"
set_name: "Limited Edition Alpha"
collector_number: "257"
rarity: "common"
artist: "Daniel Gelon"
oracle_id: "867def48-4be8-4056-bcf1-d6b00450b9a3"
canonical_url: "https://avascry.com/printing/library-of-leng-lea"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "legal"
  penny: "not_legal"
---

# Library of Leng
- **Mana Cost:** `{1}` (CMC: 1)
- **Type:** Artifact

## Oracle Text
You have no maximum hand size.
If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

## Top 4096-Dim Neural Synergies
1. [Spellbook](/printing/spellbook-m10.md) — Artifact — Book
2. [Venser's Journal](/printing/vensers-journal-c21.md) — Artifact — Book
3. [Thought Vessel](/printing/thought-vessel-msc.md) — Artifact
4. [Mine, Mine, Mine!](/printing/mine-mine-mine-ugl.md) — Enchantment
5. [Kyren Archive](/printing/kyren-archive-mmq.md) — Artifact — Book
6. [Reliquary Tower](/printing/reliquary-tower-soc.md) — Land

## Printing Details
- **Set:** Limited Edition Alpha (LEA) #257
- **Rarity:** Common
- **Artist:** Daniel Gelon
- **Total Printings:** 13 across all historical editions

## Format Legalities
Commander: `legal` | Standard: `not_legal` | Modern: `not_legal` | Pioneer: `not_legal` | Legacy: `legal` | Vintage: `legal` | Pauper: `legal` | Penny: `not_legal`

## Official Rulings
- *(2004-10-04)* You can look at a randomly discarded card before deciding where it goes.
- *(2004-10-04)* The ability replaces the normal discard action with a discard action that puts the card on the library instead of the graveyard.
- *(2004-10-04)* The discard triggers anything else that triggers on discards.
- *(2004-10-04)* The ability applies any time a spell or ability has you discard as part of its effect. It does not matter if you or your opponent control the spell or ability. The discard is forced because it is an effect.
- *(2004-10-04)* You can't use the Library of Leng ability to place a discarded card on top of your library when you discard a card as a cost, because costs aren't effects.
- *(2004-10-04)* If more than one card is discarded due to a single effect, the Library allows you to decide whether or not to use it on each of the cards. You get to decide the order the cards are placed on the library if more than one goes there.