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In the marketing or token slot section of a set booster, theres a 1/4 chance that it could be a card from The List that you pull instead

It's also an Imperial Seal for you - one mana at sorcery speed to put any card from your deck on top of your library

Aetherdrift is a great example

Its not just effective, its genius-level petty

Or say my basic land is a swamp: If I play my swamp turn 2 and play the Disowned Ancestor, I can't play a morph on turn 3 as I drop my tap land into play

Without going too deep in the top-down design, the Mosswood Dreadknight is the sets take on the Arthurian legend of the Green Knight who, after being decapitated by Sir Gawain, rides away for the two to meet a year later hence the card coming back from the dead after a time