Tsabo's Web | Magic: The Gathering
Formats Tsabo's Web is Legal in
Official Oracle Text for Tsabo's Web
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.
Official Rulings for Tsabo's Web
7/1/2013 : Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities; they have colons in their reminder text.