Sliver creatures you control get +2/+0.

Changeling (This card is every creature type.) Flying

All Slivers have "{1}, Sacrifice this permanent: This permanent deals 1 damage to any target." All Slivers have "{1}, Sacrifice this permanent: Prevent the next 1 damage that would be dealt to target player, planeswalker, or Sliver creature this turn."

All Sliver creatures have frenzy 1. (Whenever a Sliver attacks and isn't blocked, it gets +1/+0 until end of turn.)

Sliver creatures you control get +0/+1.

All Sliver creatures have vigilance.

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

Sliver creatures you control have flying.

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

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

({T}: Add {G}.)

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

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

({T}: Add {U}.)

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {B} or {G}.

({T}: Add {R}.)

({T}: Add {W}.)

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

({T}: Add {B}.)

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.)

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

Indestructible (Effects that say "destroy" don't destroy this artifact.) {T}: Add one mana of any color.

Sliver creatures you control have "{T}: Add one mana of any color."

{1}, Sacrifice this artifact: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Sliver creatures you control have "When this creature enters, you may exile target creature an opponent controls until this creature leaves the battlefield."