Trinket Mage
Creature — Human Wizard
When this creature enters, you may search your library for an artifact card with mana value 1 or less, reveal that card, put it into your hand, then shuffle.
2/2
Illustrated by
Fifth Dawn#39CommonEnglishLegality
Rulings
Mar 19, 2021
If a card in a player's library has 
in its mana cost, X is considered to be 0.