Once you maintain the crown, you can establish annoying loops with cards like Cathar Commando and Selfless Spirit that sacrifice themselves to accrue value
This card is sort of the Tooth and Nail of lands, while the other three abilities are used based on whats best for you
Valakut Awakenings a great card-filtering tool, and critical for decks that need to ensure certain cards remain in their library, like Indomitable Creativity strategies
This led to one of the most broken decks ever, enabling turn one kills in Standard
26.3 In proving service by delivery: (a) by hand, it shall be necessary only to produce a receipt for the communication signed by or on behalf of the recipient
The probability of getting a job is 1/2, so I wouldn't say that it can't be used at all, but it's a pretty tough card