This means for 7RRRR you can cycle Blast from the Past, then pay madness to play it, then play kicker and buyback
A bunch of the spells after the break reinforce this, but the coolest of them all has to be Living Lands , which animates all forests in play as 1/1 creatures -- something that would be very muhc played upon in the Zendikar blocks
On the other hand, if building a Pirate typal deck is what you're after, there are a lot of options in that direction as well
Last but not least, Commander might be all about your leader, but RPGs are often about your party as a whole, and WOTC wont leave the supporting casts of these games hanging
For a character with a proven track record of driving market prices, this is definitely a card to keep on your radar post-release
It's looking specifically for the fourth mana, not every fourth mana