Tangleroot

Artifact, 3 (3)
Whenever a player casts a creature spell, that player adds {G} to his or her mana pool.¹
As if there's glitch in the system, the Tangle sometimes folds in on itself, throwing off sparks of mana in a mystifying display.
Illus. Dana Knutson

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/7)	Mirrodin (Rare)