Have

Talon Sliver

All Sliver creatures have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end of turn.)

Sliver creatures you control have first strike.

Target creature becomes green and gets +1/+0 until end of turn.
Draw a card.

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

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}.

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

Blossoming Sands enters tapped.
When Blossoming Sands enters, you gain 1 life.
{T}: Add {G} or {W}.

Scry 3, then you may reveal the top card of your library. If it's a creature card, draw a card.

Sliver creatures you control have first strike. (They deal combat damage before creatures without first strike.)