Gemhide Sliver

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

Predatory Sliver

Megantic Sliver

Seedborn Muse

Untap all permanents you control during each other player's untap step.

Wall of Stolen Identity

You may have this creature enter as a copy of any creature on the battlefield, except it's a Wall in addition to its other types and has defender. When you do, tap the copied creature and it doesn't untap during its controller's untap step for as long as you control this creature.

Venom Sliver

Sliver creatures you control have deathtouch. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)

Dormant Sliver

All Sliver creatures have defender.
All Slivers have "When this permanent enters, draw a card."

Fungus Sliver

All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it." (It must survive the damage to get the counter.)

Mnemonic Sliver

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

Counterspell

Forest

Eternal Witness

When this creature enters, you may return target card from your graveyard to your hand.

Command Tower

{T}: Add one mana of any color in your commander's color identity.

Winged Sliver

Hydroid Krasis

When you cast this spell, you gain half X life and draw half X cards. Round down each time.
Flying, trample
This creature enters with X +1/+1 counters on it.

Island

Quick Sliver

Flash
Any player may cast Sliver spells as though they had flash.

Reliquary Tower

You have no maximum hand size.
{T}: Add {C}.

Telekinetic Sliver

All Slivers have "{T}: Tap target permanent."

Kiora, the Crashing Wave

+1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.
−1: Draw a card. You may play an additional land this turn.
−5: You get an emblem with "At the beginning of your end step, create a 9/9 blue Kraken creature token."