North Star 
Artifact
$29.52 #31503 0.19 32.3 years
, 
: For one spell this turn, you may spend mana as though it were mana of any type to pay that spell's mana cost. (Additional costs are still paid normally.)Click a line or tag to filter
Cards similar to North Star 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.
Standing Stones82%
$0.82↓#314980.57↑32.1 years
"
, , Pay 1 life: Add one mana of any color."
, , Pay 1 life: Add one mana of any color."
Quicksilver Elemental82%
$20.07↓#7905↑0.60↑22.9 years↓
"You may spend blue mana as though it were mana of any color to pay the activation costs of this creature's abilities."
Blood Celebrant82%
$0.74↓#5840↑0.09↓23.6 years↓
"
, Pay 1 life: Add one mana of any color."
, Pay 1 life: Add one mana of any color."
Mana Prism76%
$0.18↓#24925↑0.00↓29.9 years↓
": Add 
."
: Add ."
Vizier of the Menagerie73%
$0.36↓#4270↑0.269.4 years↓
"You can spend mana of any type to cast creature spells."
Kentaro, the Smiling Cat71%
$2.23↓#17876↑0.1321.6 years↓
"You may pay 
rather than pay the mana cost for Samurai spells you cast, where X is that spell's mana value."
rather than pay the mana cost for Samurai spells you cast, where X is that spell's mana value."
Agatha's Soul Cauldron70%
$35.79↑#1375↑1.18↑3.0 years↓
"You may spend mana as though it were mana of any color to activate abilities of creatures you control."
Chromatic Orrery70%
$34.10↑#1252↑0.60↑6.2 years↓
"You may spend mana as though it were mana of any color."