On a low mana value card, such as Shardless Agent, the cascade ability typically functions more like a tutor, searching your library for a card with mana value two or less and casting it for free
Getting a free land drop from Court of Bounty
This isn't a regular occurrence, though, and it's entirely dependent on Wizards' ongoing strategy for working with game stores - if you're angling for extra codes, we'd recommend checking in with the staff at your LGS to see if there's anything on offer
Theres cheaper ways to blink a whole board, which is ultimately what matters, but students of the school of flicker should still be excited about Semester's End
It doesn't matter if that artifact stays an artifact or stays under your control
That a decision being put into your opponents hands might not be as painful if its a decision they must make (its quite difficult to win most games of Limited without attacking)