While a little confusing on paper, this boils down to allowing the repeated use of exhaust abilities, turning them from a once-per-game affair into a once-per-turn situation, allowing for many of the more powerful abilities using this keyword to be activated again and again
Path To Exile was an obvious inclusion, as it stands to reason that poor little wanderer has been the victim of the iconic spell at least once
If heads, prevent all effects of an attack, including damage, done to Furret during your opponent's next turn Illustrator : Mr
At some point, I saw and built a Grixis Dragonstorm Commander deck with cheap ramp spells, tutors, and fast mana to build up into a large Dragonstorm, and swing for the win with hasty dragons thanks to Dragonlord Kolaghan or a convoluted combo involving Worldgorger Dragon and Animate Dead, making it one of the funniest decks Ive ever played with