Urza's Filter
Mana cost
Mana value4TypeArtifact
Color identity
Colorless
RarityRare
SetInvasion (INV)
ArtistDave Dorman
Price€2.28 · foil €13.57 · $4.93
Urza's Filter 
Artifact
Multicolored spells cost
less to cast.
"It's a tool for aiding my other tools," explained Urza. "Now they'll work in harmony."