---
name: "Moseo, Vein's New Dean"
mana_cost: "{2}{B}"
cmc: 3
type_line: "Legendary Creature — Bird Skeleton Warlock"
colors: []
color_identity: ["B"]
keywords: ["Infusion", "Flying"]
set: "PSOS"
set_name: "Secrets of Strixhaven Promos"
collector_number: "91p"
rarity: "rare"
artist: "Abz J Harding"
oracle_id: "c2e2f21a-0338-44d7-96a5-5a277f0ec419"
canonical_url: "https://avascry.com/printing/moseo-veins-new-dean-psos"
legalities:
  commander: "legal"
  standard: "legal"
  modern: "legal"
  pioneer: "legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Moseo, Vein's New Dean
- **Mana Cost:** `{2}{B}` (CMC: 3)
- **Type:** Legendary Creature — Bird Skeleton Warlock
- **Keywords:** Infusion, Flying

## Oracle Text
Flying
When Moseo enters, create a 1/1 black and green Pest creature token with "Whenever this token attacks, you gain 1 life."
Infusion — At the beginning of your end step, if you gained life this turn, return up to one target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.

## Top 4096-Dim Neural Synergies
1. [Veinwitch Coven](/printing/veinwitch-coven-soc.md) — Creature — Vampire Warlock
2. [Essenceknit Scholar](/printing/essenceknit-scholar-sos.md) — Creature — Dryad Warlock
3. [Callous Bloodmage](/printing/callous-bloodmage-stx.md) — Creature — Vampire Warlock
4. [Beledros Witherbloom](/printing/beledros-witherbloom-soc.md) — Legendary Creature — Elder Dragon
5. [Tivash, Gloom Summoner](/printing/tivash-gloom-summoner-c21.md) — Legendary Creature — Human Warlock
6. [Scion of the Swarm](/printing/scion-of-the-swarm-znr.md) — Creature — Vampire Cleric

## Printing Details
- **Set:** Secrets of Strixhaven Promos (PSOS) #91p
- **Rarity:** Rare
- **Artist:** Abz J Harding
- **Total Printings:** 3 across all historical editions

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

## Official Rulings
- *(2026-03-20)* If a card in a graveyard has {X} in its mana cost, X is 0 for the purpose of determining its mana value.
- *(2026-03-20)* Moseo's last ability will check as your end step starts to see if you gained life this turn. If you didn't, the ability won't trigger at all. It's not possible to gain life during your end step in time to have the ability trigger.