Essence Sliver

Whenever a Sliver deals damage, its controller gains that much life.

Plated Sliver

As Ward Sliver enters, choose a color.
All Slivers have protection from the chosen color.

Slivers can't be blocked except by Slivers.

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

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

Whenever a Sliver deals combat damage to a creature, destroy that creature. It can't be regenerated.

Whenever a Sliver deals combat damage to a player, its controller may create a 1/1 colorless Sliver creature token.

This spell can't be countered.
Sliver spells can't be countered.

All Slivers have shroud. (They can't be the targets of spells or abilities.)

All Slivers have "Pay 2 life: Return this permanent to its owner's hand."

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

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

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

Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.