Guildmark (Unknown Event #RA12a)

Guildmark {2}

Artifact

Pledge (Join a two-colored guild if you haven’t already this game.)

{T}: Add one mana of your guild’s colors.

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny