In EDH you get access to three Impetuses right off the bat which is nice. One of them is even courteous enough to recur itself.
I have to wonder if in commander the threat of the second ability might incentivize your opponents to kill this creature earlier or more often than the first ability.
[[Ghoulish Impetus]]
[[Martial Impetus]]
[[Parasitic Impetus]]
[[card name]] to call