"Wait, where am I? Who am I? And what are you?"
—Skyshroud secretkeeper, last words

Secret Lair Drop

Mesmeric Sliver

All Slivers have "When this permanent enters, you may fateseal 1." (To fateseal 1, its controller looks at the top card of an opponent's library, then they may put that card on the bottom of that library.)

Future Sight

All Slivers have "When this permanent comes into play, you may fateseal 1." (Its controller looks at the top card of an opponent's library, then he or she may put that card on the bottom of that library.)