Muscle Sliver

Barbed Sliver

All Sliver creatures have "{2}: This creature gets +1/+0 until end of turn."

Crossbow Ambush

Creatures you control gain reach until end of turn. (They can block creatures with flying.)

Heart Sliver

Forest

Mountain

Skyshaper

Sacrifice Skyshaper: Creatures you control gain flying until end of turn.

Change of Heart

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Target creature can't attack this turn.

Victual Sliver

All Slivers have "{2}, Sacrifice this permanent: You gain 4 life."

Plains

Disenchant

Onslaught

Whenever you cast a creature spell, tap target creature.

Spined Sliver

Whenever a Sliver becomes blocked, that Sliver gets +1/+1 until end of turn for each creature blocking it.

Talon Sliver

Armor Sliver

All Sliver creatures have "{2}: This creature gets +0/+1 until end of turn."