Secret Lair Drop

Sliver Overlord

{3}: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle.
{3}: Gain control of target Sliver. (This effect lasts indefinitely.)

Premium Deck Series: Slivers

{3}: Search your library for a Sliver card, reveal that card, and put it into your hand. Then shuffle your library.
{3}: Gain control of target Sliver.

Scourge

{3}: Search your library for a Sliver card, reveal that card, and put it into your hand. Then shuffle your library.
{3}: Gain control of target Sliver. (This effect doesn't end at end of turn.)