You may spend white mana as though it were red mana.
Illustrated by Dan Frazier · Fourth Edition Foreign Black Border · #347
There are no rulings for Sunglasses of Urza.
, : 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.)
You may cast spells as though they had flash.
Flash
You may cast artifact spells as though they had flash.
This artifact enters tapped.
This artifact has all activated abilities of all lands on the battlefield.
You may spend mana as though it were mana of any color to pay the activation costs of this artifact's abilities.
You may pay rather than pay the mana cost for spells you cast.
Red creature spells you cast cost less to cast.
Whenever you cast a creature spell, you may discard a card. If you do, draw a card.