The Water Crystal 
Legendary Artifact
$3.59 #1473 0.78 1.4 years
Blue spells you cast cost 
less to cast.
less to cast.If an opponent would mill one or more cards, they mill that many cards plus four instead.
, 
: Each opponent mills cards equal to the number of cards in your hand.Click a line or tag to filter
Cards similar to The Water Crystal 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.
Sapphire Medallion92%
$7.87↑#354↑0.34↓29.0 years↑
"Blue spells you cast cost less to cast."
less to cast."
Bruvac the Grandiloquent86%
$41.00↑#2125↓1.55↑6.3 years↑
"If an opponent would mill one or more cards, they mill twice that many cards instead."
Grand Arbiter Augustin IV82%
$18.23↑#1808↓2.76↑20.5 years↑
"Blue spells you cast cost less to cast."
less to cast."
Nightscape Familiar80%
$0.42↓#1159↑0.12↓25.7 years↑
"Blue spells and red spells you cast cost less to cast."
less to cast."
Sunscape Familiar80%
$1.32↓#6171↓0.00↓25.7 years↑
"Green spells and blue spells you cast cost less to cast."
less to cast."
Kefnet's Monument78%
$0.38↓#5045↓0.47↓9.5 years↑
"Blue creature spells you cast cost less to cast."
less to cast."
Vantress Gargoyle75%
$0.24↓#11913↓0.13↓7.0 years↑
": Each player mills a card."
: Each player mills a card."
Stone Calendar74%
$14.91↑#20542↓0.37↓32.2 years↑
"Spells you cast cost less to cast."
less to cast."
Folio of Fancies73%
$1.86↓#2772↓0.34↓7.0 years↑
", : Each opponent mills cards equal to the number of cards in their hand."
, : Each opponent mills cards equal to the number of cards in their hand."
Defiler of Dreams72%
$0.59↓#4360↓0.18↓4.1 years↑
"As an additional cost to cast blue permanent spells, you may pay 2 life. Those spells cost less to cast if you paid life this way. This effect reduces only the amount of blue mana you pay."
less to cast if you paid life this way. This effect reduces only the amount of blue mana you pay."
Gearsmith Guardian70%
$0.06↓#29413↓0.00↓8.3 years↑
"This creature gets +2/+0 as long as you control a blue creature."
Memory Crystal70%
$2.23↓#24089↓0.19↓28.3 years↑
"Buyback costs cost less."
less."
Briarberry Cohort70%
$0.18↓#26287↓0.05↓18.5 years↑
"This creature gets +1/+1 as long as you control another blue creature."