This turn and next turn, creatures can't attack, and players and permanents can't be the targets of spells or activated abilities.
"By the tongues of a thousand serpents, this time I do not lie."
—Ahmahz il Kin, Suq'Ata diplomat
(04/10/2004)
Can be cast after your attack.
(08/06/2016)
Activated abilities contain a colon. They’re generally written “Cost: Effect.” Some keywords are activated abilities and will have colons in their reminder text.
(04/10/2004)
It affects the current turn and the next turn. This could affect the same player twice if they have two turns in a row, or it could affect different players. In a multiplayer game it affects exactly two turns, not a full round of turns.
(01/02/2006)
Doesn’t skip the Combat Phase, just renders creatures unable to attack.