Blur Sliver

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

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 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.)

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

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

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}.

Intervention deals 3 damage to any target and you gain 3 life.

Target creature gets +2/+2 until end of turn.

Create two 1/1 colorless Sliver creature tokens.

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