Woodland Weavemaster (#143)

Type: Creature — Elf Druid

Text: Vigilance
Whenever another Elf you control enters, this creature gets +1/+1 until end of turn.
{T}: Add X mana of any one color, where X is this creature's power. Spend this mana only to cast Elf spells and activate abilities of Elf sources.

Set: The Hobbit (#143)