Pulse of Llanowar
Enchantment
If a basic land you control is tapped for mana, it produces mana of a color of your choice instead of any other type.
Printings & Conditions (1)
Invasion (INV)(Invasion)#202Uncommon
Enchantment
If a basic land you control is tapped for mana, it produces mana of a color of your choice instead of any other type.