Cosi's Trickster
Card Information
Type: Creature — Merfolk Wizard
Mana Cost: 
CMC: 1
Part of the Reserved List: No
Color Identity:
Set: Zendikar (ZEN)
Rarity: Rare
Collector Number: 45
Oracle Text
Whenever an opponent shuffles their library, you may put a +1/+1 counter on this creature.
Format Legalities
Card Rulings
- October 1, 2009
The cascade ability doesn’t cause a player to shuffle their library, even if that player revealed their entire library. The revealed cards are put on the bottom of their owner’s library in a random order, but they’re not “shuffled.”
Source: wotc - October 1, 2009
If an opponent’s library is empty or has just a single card in it when a spell or ability instructs that player to shuffle their library, Cosi’s Trickster’s ability will still trigger.
Source: wotc - October 1, 2009
Cosi’s Trickster’s ability triggers when an opponent shuffles their library because that player was instructed to do so by a spell or ability that specifically contains the word “shuffle” in its text or (in the case of a keyword ability) in its rules.
Source: wotc
Price History
To study a single card is to glimpse the heart of a spell - a frozen moment of ambition, artistry, and arcane intent. Within each glyph lies a spark: a story untold, a duel turned, a destiny altered. Treat it not as mere parchment, dear seeker, but as a shard of the Multiverse itself.