Sidewinder Sliver

All Sliver creatures have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end of turn.)

Ancient Den

Gemhide Sliver

All Slivers have "{T}: Add one mana of any color."

Tree of Tales

Hunter Sliver

All Sliver creatures have provoke. (Whenever a Sliver attacks, its controller may have target creature defending player controls untap and block it if able.)

Bequeathal

Enchant creature
When enchanted creature dies, you draw two cards.

Metallic Sliver

Muscle Sliver

Tormod's Crypt

{T}, Sacrifice this artifact: Exile target player's graveyard.

Masked Vandal

Changeling (This card is every creature type.)
When this creature enters, you may exile a creature card from your graveyard. If you do, exile target artifact or enchantment an opponent controls.

Lull

Prevent all combat damage that would be dealt this turn.
Cycling {2} ({2}, Discard this card: Draw a card.)

All That Glitters

Enchant creature
Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

Spinneret Sliver

Slagwoods Bridge

This land enters tapped.
Indestructible
{T}: Add {R} or {G}.

Sentinel Sliver

Sliver creatures you control have vigilance. (Attacking doesn't cause them to tap.)

Riot Control

You gain 1 life for each creature your opponents control. Prevent all damage that would be dealt to you this turn.

Great Furnace

Thornglint Bridge

This land enters tapped.
Indestructible
{T}: Add {G} or {W}.

Predatory Sliver

Heart Sliver

Angelic Renewal

Whenever a creature is put into your graveyard from the battlefield, you may sacrifice this enchantment. If you do, return that card to the battlefield.