Spinneret Sliver

Two-Headed Sliver

All Sliver creatures have menace. (They can't be blocked except by two or more creatures.)

Muscle Sliver

Crypt Sliver

All Slivers have "{T}: Regenerate target Sliver."

Gemhide Sliver

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

Watcher Sliver

Striking Sliver

Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)

Arcane Signet

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

Winged Sliver

Marshals' Pathcruiser

When this Vehicle enters, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Exhaust — {W}{U}{B}{R}{G}: This Vehicle becomes an artifact creature. Put two +1/+1 counters on it. (Activate each exhaust ability only once.)
Crew 5

Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Sentinel Sliver

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

Lymph Sliver

All Sliver creatures have absorb 1. (If a source would deal damage to a Sliver, prevent 1 of that damage.)

Homing Sliver

Each Sliver card in each player's hand has slivercycling {3}.
Slivercycling {3} ({3}, Discard this card: Search your library for a Sliver card, reveal it, put it into your hand, then shuffle.)

Amoeboid Changeling

Changeling (This card is every creature type.)
{T}: Target creature gains all creature types until end of turn.
{T}: Target creature loses all creature types until end of turn.