Mnemonic Nexus 
Instant
$0.32 #20780 0.30 21.0 years
Each player shuffles their graveyard into their library.
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Cards similar to Mnemonic Nexus 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.
Struggle // Survive93%
$0.14↓#15833↑0.16↓9.3 years↓
"Each player shuffles their graveyard into their library."
Reminisce91%
$0.20↓#187630.17↓24.0 years↑
"Target player shuffles their graveyard into their library."
Clear the Mind90%
$0.25↓#7210↑0.217.7 years↓
"Target player shuffles their graveyard into their library."
Learn from the Past90%
$0.15↓#10670↑0.06↓11.6 years↓
"Target player shuffles their graveyard into their library."
Thran Foundry84%
$0.48↑#206160.15↓27.4 years↑
"
, 
, Exile this artifact: Target player shuffles their graveyard into their library."
, , Exile this artifact: Target player shuffles their graveyard into their library."
Morality Shift79%
$5.36↑#13932↑0.18↓24.4 years↑
"Exchange your graveyard and library. Then shuffle your library."
Blessed Respite79%
$0.34↑#3805↑0.17↓5.3 years↓
"Target player shuffles their graveyard into their library. Prevent all combat damage that would be dealt this turn."
Primal Command78%
$0.29↓#5759↑0.00↓19.0 years↓
"• Target player shuffles their graveyard into their library."
Cranial Archive78%
$0.21↓#14511↑0.00↓12.1 years↓
"
, Exile this artifact: Target player shuffles their graveyard into their library. Draw a card."
, Exile this artifact: Target player shuffles their graveyard into their library. Draw a card."
Temporal Cascade74%
$0.60↑#174930.47↑23.0 years↑
"• Each player shuffles their hand and graveyard into their library."
Paradigm Shift74%
$6.07↑#15637↑0.56↑29.4 years↑
"Exile all cards from your library. Then shuffle your graveyard into your library."
Quest for Ancient Secrets72%
$0.19↓#188350.12↓17.0 years↓
"Remove five quest counters from this enchantment and sacrifice it: Target player shuffles their graveyard into their library."
Psychic Spiral71%
$0.26↓#11010↑0.2414.0 years↓
"Shuffle all cards from your graveyard into your library. Target player mills that many cards."
Echo of Eons70%
$10.16↑#2613↑0.76↑7.4 years↓
"Each player shuffles their hand and graveyard into their library, then draws seven cards."
Timetwister70%
$6400.00↑#3590↑1.58↑33.2 years↑
"Each player shuffles their hand and graveyard into their library, then draws seven cards."
Inverter of Truth70%
$1.10↑#13196↑0.48↑10.7 years↓
"When this creature enters, exile all cards from your library face down, then shuffle all cards from your graveyard into your library."
Time Reversal70%
$2.41↑#6434↑0.50↑16.3 years↓
"Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile this card."