Spiteful Sliver

Sliver creatures you control have "Whenever this creature is dealt damage, it deals that much damage to target player or planeswalker."

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.)

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

Sliver creatures you control have "When this creature enters, it deals 1 damage to target player or planeswalker and you gain 1 life."

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

Create two 1/1 colorless Sliver creature tokens.

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}.

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

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