Spooky20

Choose a creature type. Draw a card for each permanent you control of that type.

Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

All Sliver creatures have double strike.

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

{3}: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle. {3}: Gain control of target Sliver. (This effect...

All Sliver creatures get +2/+2.

All Slivers have "{2}, Sacrifice this permanent: This permanent deals 2 damage to any target."

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

All Slivers have "{T}: Add one mana of any color."

All Sliver creatures have haste.

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

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

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

All Slivers have "{2}: Regenerate this permanent."

All Slivers have "Pay 2 life: Return this permanent to its owner's hand."

All Slivers have shroud. (They can't be the targets of spells or abilities.)