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Reset graveyards and give your opponent a fresh set of 7 cards, end your turn. Seems terrible.

Diminishing returns and Reforge the Soul seem infinitely better since you don't give your opponent an...

Because chain of vapor doesn't answer all of those things, while being instant speed and still hitting hate-bears (with the bonus of re-casting your artifact mana)? Shattering spree is horrible, I...

Bring something to nibble on.

Make notes of when you have a difficult choice (what to blind therapy - what to wish for, etc.).

Always write down what you reveal via discard/probe (and cross off...

The most frequent use I've had for DR is as a reset against dredge once you've played out a few lands and/or artifact mana.