What's the duration of the wizard level 5 attack power, Savage Transformation?
The card reads:
Hit: 2d8 + Intelligence modifier damage, and you partially transform the target's mind and body into that of a savage monster (save ends). Until this transformation ends, the target must make an opportunity attack against any creature that willingly leaves a square adjacent to it, and if any creature ends its turn adjacent to the target, the target must use a free action to deal damage to that creature equal to 5 +your Intelligence modifier.
…but there's no mention of the duration!
Thanks in advance.