---
name: "Echo of Eons"
mana_cost: "{4}{U}{U}"
cmc: 6
type_line: "Sorcery"
colors: ["U"]
color_identity: ["U"]
keywords: ["Flashback"]
set: "PRM"
set_name: "Magic Online Promos"
collector_number: "95469"
rarity: "rare"
artist: "Victor Adame Minguez"
oracle_id: "23d3e5fe-3f82-44cf-91a1-6646a12a0255"
canonical_url: "https://avascry.com/printing/echo-of-eons-prm"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "not_legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Echo of Eons
- **Mana Cost:** `{4}{U}{U}` (CMC: 6)
- **Type:** Sorcery
- **Keywords:** Flashback

## Oracle Text
Each player shuffles their hand and graveyard into their library, then draws seven cards.
Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

## Top 4096-Dim Neural Synergies
1. [Time Reversal](/printing/time-reversal-m11.md) — Sorcery
2. [Diminishing Returns](/printing/diminishing-returns-me1.md) — Sorcery
3. [Temporal Cascade](/printing/temporal-cascade-mrd.md) — Sorcery
4. [Emergency Powers](/printing/emergency-powers-prna.md) — Instant
5. [Day's Undoing](/printing/days-undoing-cmm.md) — Sorcery
6. [Time Spiral](/printing/time-spiral-prm.md) — Sorcery

## Printing Details
- **Set:** Magic Online Promos (PRM) #95469
- **Rarity:** Rare
- **Artist:** Victor Adame Minguez
- **Total Printings:** 14 across all historical editions

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