Cosi's Trickster
Creature — Merfolk Wizard
Whenever an opponent shuffles their library, you may put a +1/+1 counter on this creature.
- CMC
- 1
- Mana cost
- Color identity
- U
- Rarity
- rare
- Set
- Zendikar
- Price
- $0.42
- EDHREC rank
- #14780
Cosi's Trickster is a one-mana 1/1 that grows every time any opponent searches their library — in a four-player Commander pod full of fetch lands, tutors, and ramp spells, it can reach absurd size fast. Kumena, Tyrant of Orazca decks run it because a big Merfolk that taps itself is exactly what Kumena wants.
Best Commanders
Commanders with the highest synergy
Kumena, Tyrant of Orazca
Kumena, Tyrant of Orazca turns Cosi's Trickster into a self-tapping threat: the more opponents fetch and tutor, the larger it gets, and a large Merfolk that can tap itself feeds Kumena's draw and pump abilities without needing any other setup.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
In Commander, Cosi's Trickster is at its best — four players means four sets of fetch lands, Cultivates, and Demonic Tutors feeding counters onto it, often for free from across the table. In Legacy and Vintage, where fetch lands are ubiquitous, it can technically grow, but a reactive 1/1 with no immediate board impact loses badly to a format full of Force of Will and turn-one threats. Modern is theoretically playable — fetches are everywhere — but Cosi's Trickster does nothing the turn it enters and competes in a format that punishes slow starts, so it rarely sees a slot. Commander is the only format where the passive counter-accumulation is consistent enough to justify the card.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.42 bulk tier
At $0.42, Cosi's Trickster sits firmly in bulk territory, which is appropriate for a card with narrow application outside Commander. It's not a card that trends upward — no reprint pressure, no spike potential — so buy it when you need it and don't think twice about the cost.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.