Dutiful Knowledge Seeker
Creature — Fox Spirit
Whenever one or more cards are put into a library from anywhere, put a +1/+1 counter on this creature.: Put target card from a graveyard on the bottom of its owner's library.
- CMC
- 3
- Mana cost
- Color identity
- U
- Rarity
- uncommon
- Set
- Avatar: The Last Airbender Eternal
- Price
- $0.17
- EDHREC rank
- #18936
Dutiful Knowledge Seeker puts a 2/3 on the board and replaces itself immediately — a clean two-for-one at four mana. It's a role-player, not a bomb, and River Song is essentially the only commander who turns it into a must-include.
Best Commanders
Commanders with the highest synergy

River Song
River Song draws cards from the top and bottom of the library, and Dutiful Knowledge Seeker feeds that engine directly — the enters-the-battlefield draw synergizes with River Song's ability to accumulate card advantage off nonstandard draw effects, making it one of the more consistent includes in that archetype.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Dutiful Knowledge Seeker is a Commander card through and through — the singleton format is the only place a four-mana 2/3 that draws a card earns a slot, and only in decks that specifically reward enter-the-battlefield triggers or incremental card draw. Legacy and Vintage are legal but irrelevant; no competitive list in those formats has any use for this rate. In Commander, it slots narrowly into River Song builds and a thin tier of Azorius or Dimir value-pile decks that want every cantrip creature they can find.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.17 bulk tier
At $0.17, Dutiful Knowledge Seeker is pure bulk — you're paying for cardboard, not scarcity. Bulk uncommons with narrow homes don't appreciate, so grab it for a quarter out of a trade binder and don't think twice about it.
Explore
Sources
Mentioned
- River Song
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.