Arachnoform

Enchant creature
Enchanted creature gets +2/+2, has reach, and is every creature type.

Poultice Sliver

All Slivers have "{2}, {T}: Regenerate target Sliver." (The next time that Sliver would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Striking Sliver

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

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.)

Watcher Sliver

Lymph Sliver

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

Sinew Sliver

Plated Sliver

Predatory Sliver

Amorphous Axe

Equipped creature gets +3/+0 and is every creature type.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)

Reflex Sliver

Heart Sliver

Horned Sliver

Barbed Sliver

All Sliver creatures have "{2}: This creature gets +1/+0 until end of turn."

Sliver Construct

Blur Sliver

Sliver creatures you control have haste. (They can attack and {T} as soon as they come under your control.)

Groundshaker Sliver

Sliver creatures you control have trample. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)

Gemhide Sliver

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

Muscle Sliver

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.)

Talon Sliver

Bonesplitter Sliver

Venser's Sliver

Metallic Sliver

Battering Sliver

Armor Sliver

All Sliver creatures have "{2}: This creature gets +0/+1 until end of turn."

Bladeback Sliver

Hellbent — As long as you have no cards in hand, Sliver creatures you control have "{T}: This creature deals 1 damage to target player or planeswalker."

Sentinel Sliver

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

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.)

Spinneret Sliver

Quick Sliver

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

Virulent Sliver

All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)

Enduring Sliver

Outlast {2} ({2}, {T}: Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Other Sliver creatures you control have outlast {2}.

Cleaving Sliver

Runed Stalactite

Equipped creature gets +1/+1 and is every creature type.
Equip {2}

Lancer Sliver

Sliver creatures you control have first strike.

Two-Headed Sliver

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