Winged Sliver

Dark Banishing

Destroy target nonblack creature. It can't be regenerated.

Heart Sliver

Overrun

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

Dread of Night

Island

Mnemonic Sliver

All Slivers have "{2}, Sacrifice this permanent: Draw a card."

Lobotomy

Target player reveals their hand, then you choose a card other than a basic land card from it. Search that player's graveyard, hand, and library for all cards with the same name as the chosen card and exile them. Then that player shuffles.

Extinction

Destroy all creatures of the creature type of your choice.

Elvish Fury

Buyback {4} (You may pay an additional {4} as you cast this spell. If you do, put this card into your hand as it resolves.)
Target creature gets +2/+2 until end of turn.

Duplicity

When Duplicity enters, exile the top five cards of your library face down.
At the beginning of your upkeep, you may exile all cards from your hand face down. If you do, put all other cards you own exiled with Duplicity into your hand.
At the beginning of your end step, discard a card.
When you lose control of Duplicity, put all cards exiled with Duplicity into their owner's graveyard.

Harrow

As an additional cost to cast this spell, sacrifice a land.
Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Muscle Sliver

Swamp

Wood Sage

{T}: Choose a creature card name. Reveal the top four cards of your library and put all of them with that name into your hand. Put the rest into your graveyard.

Clot Sliver

All Slivers have "{2}: Regenerate this permanent."

Mindwhip Sliver

All Slivers have "{2}, Sacrifice this permanent: Target player discards a card at random. Activate only as a sorcery."