Harmonic Sliver

All Slivers have "When this permanent enters, destroy target artifact or enchantment."

Manaweft Sliver

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

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

Sliver creatures you control have double strike. (They deal both first-strike and regular combat damage.)

Sliver creatures you control have indestructible. (Damage and effects that say "destroy" don't destroy them.)

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

Sliver creatures you control have flying and haste.

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