Serra Bestiary

{W}{W} · Enchantment — Aura

Enchant creature At the beginning of your upkeep, sacrifice this Aura unless you pay {W}{W}. Enchanted creature can't attack or block, and its activated abilities with {T} in their costs can't be activated.

Motor: se resuelve a mano

Rulings (2)

Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities and will have colons in their reminder text.
Wizards of the Coast · 2016-06-08
Does prevent the use of activated mana abilities with {T} in the cost.
Wizards of the Coast · 2004-10-04