Tezzeret the Seeker 
Legendary Planeswalker — Tezzeret
$22.78 #1730 0.70 17.9 years
+1: Untap up to two target artifacts.
−X: Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
−5: Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn.
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Cards similar to Tezzeret the Seeker expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Tezzeret, Cruel Captain83%
$19.21↓#1256↑0.701.1 years↓
"−3: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle."
+2 more matching lines
Reshape82%
$3.66↓#3121↓0.42↓22.6 years↑
"Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle."
Whir of Invention82%
$6.61↓#1315↑0.51↓9.6 years↓
"Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle."
Repurposing Bay80%
$0.77↓#3802↓0.50↓1.6 years↓
"
, 
, Sacrifice another artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery."
, , Sacrifice another artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery."
The Antiquities War80%
$0.31↓#11831↓0.50↓8.4 years↓
"Artifacts you control become artifact creatures with base power and toughness 5/5 until end of turn."
Filigree Sages80%
$0.58↓#13246↓0.26↓17.9 years
": Untap target artifact."
: Untap target artifact."
Oswald Fiddlebender79%
$2.39↓#2889↓0.47↓5.1 years↓
"
, , Sacrifice an artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put it onto the battlefield, then shuffle. Activate only as a sorcery."
, , Sacrifice an artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put it onto the battlefield, then shuffle. Activate only as a sorcery."
Manifold Key78%
$1.54↓#1032↑0.39↓7.2 years↓
"
, : Untap another target artifact."
, : Untap another target artifact."
Voltaic Key78%
$4.85↓#17570.42↓27.9 years↑
", : Untap target artifact."
, : Untap target artifact."
Voltaic Servant78%
$0.22↓#10321↓0.20↓8.4 years↓
"At the beginning of your end step, untap target artifact."
Kuldotha Forgemaster76%
$10.79↓#2675↓0.59↓15.9 years↓
", Sacrifice three artifacts: Search your library for an artifact card, put it onto the battlefield, then shuffle."
, Sacrifice three artifacts: Search your library for an artifact card, put it onto the battlefield, then shuffle."
Living Brain, Mechanical Marvel76%
$0.21↓#16118↓0.38↓1.0 years↓
"At the beginning of combat on your turn, target non-Equipment artifact you control becomes an artifact creature with base power and toughness 3/3 until end of turn. Untap it."
Galvanic Key75%
$0.16↓#19596↓0.21↓22.9 years↑
", : Untap target artifact."
, : Untap target artifact."
Synod Artificer75%
$0.42↓#24222↓0.53↓22.6 years↑
"
, : Untap X target noncreature artifacts."
, : Untap X target noncreature artifacts."
Sonic Screwdriver74%
$2.75↓#19200.762.9 years↓
", : Untap another target artifact."
, : Untap another target artifact."
Alloy Animist74%
$0.16↓#22818↓0.00↓3.8 years↓
"
: Until end of turn, target noncreature artifact you control becomes a 4/4 artifact creature."
: Until end of turn, target noncreature artifact you control becomes a 4/4 artifact creature."
Tezzeret, Agent of Bolas74%
$3.76↓#14257↓0.44↓15.6 years↓
"−1: Target artifact becomes an artifact creature with base power and toughness 5/5."
Aphetto Alchemist74%
$2.51↓#4927↓0.18↓23.9 years↑
": Untap target artifact or creature."
: Untap target artifact or creature."
Tezzeret the Schemer73%
$0.73↓#18662↓0.94↑9.6 years↓
"−7: You get an emblem with "At the beginning of combat on your turn, target artifact you control becomes an artifact creature with base power and toughness 5/5.""
+1 more matching line
Transmute Artifact73%
$403.13↑#3643↓0.96↑32.5 years↑
"Sacrifice an artifact. If you do, search your library for an artifact card. If that card's mana value is less than or equal to the sacrificed artifact's mana value, put it onto the battlefield. If it's greater, you may pay , where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle."
, where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle."