Signet of Du Weldenvarden

{t}: Add one mana of any color.
{g}{1}{t}: Add three mana of any combination of
colors. Spend this mana only to cast Elf, Dragon
or Dragonrider spells.
Elves sing to trees and plants in the Ancient Language
to get them to grow and shape themselves the way the
elves want to. This is how they make their houses,
bows, as well as other wooden items.