mtg hakbal commander deck of the Surging Soul Chibi Precon Primer - Explorers of

When you can play it the Cloud brings awesome power offering a pretty good representation of a Mind Twist, an Armageddon, a Wrath of God or a Fireball, often a couple of those things and almost always far worse for your opponent than you

In fact Watchwolf was a staple of the 2006/2007 metagame in various Zoo and Ghazi Glare decks

It gets a little better as well if you're running a Lifegain subtheme, perhaps with Heliod, Sun-Crowned in the 99

While it does have a once per turn limiter, that wont stop you from getting insane value

There's a lot of Equipment that can be attached to Helitrooper for free after that cost reduction, both in Limit Break and in Magic at-large