Awesome Cyber Monday

All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it." (The damage is dealt before the counter is put on.)

All Sliver creatures have reach. (They can block creatures with flying.)

Counter target spell. If the spell is countered this way, exile it with three time counters on it instead of putting it into its owner's graveyard....

All Sliver creatures get +1/+1.

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

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) You can't lose th...

Exile Simian Spirit Guide from your hand: Add {R}.

Each Sliver card in each player's hand has slivercycling {3}. Slivercycling {3} ({3}, Discard this card: Search your library for a Sliver card, rev...

Destroy target creature. It can't be regenerated. Its controller creates a 3/3 green Ape creature token.

Flash Flying If an opponent would search a library, that player searches the top four cards of that library instead.

Each land is a Swamp in addition to its other land types.

Counter target spell unless its controller pays {1}.

All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or ...

Draw three cards.

Return target creature card from your graveyard to the battlefield. Flashback—Sacrifice three creatures. (You may cast this card from your graveyar...

Buyback—Sacrifice three Islands. (You may sacrifice three Islands in addition to any other costs as you cast this spell. If you do, put this card i...

Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game.

Exile target artifact or enchantment. If you cast this spell during your main phase, you may exile up to one other target artifact or enchantment.

All Sliver creatures have flying. All Slivers have "If this permanent would be put into a graveyard, you may put it on top of its owner's library i...

Counter target spell that targets a permanent you control.

{T}: Add {C}. {T}: Regenerate target Insect, Rat, Spider, or Squirrel.

{1}, {T}, Discard a card: Create a 1/1 colorless Sliver artifact creature token named Metallic Sliver.

As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less ...

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color. When Chromatic Star is put into a graveyard from the battlefield, draw a card.