Mana Leech USG/141

Set: Urza's Saga
Collector Code: USG/141
Name: Mana Leech
Type: Creature — Leech
Oracle text: You may choose not to untap this creature during your untap step. {T}: Tap target land. It doesn't untap during its controller's untap step for as long as this creature remains tapped.
Rarity: Uncommon