Awesome Cyber Monday

Slivers can't be blocked except by Slivers.

{1}{U}: Change Riptide Mangler's base power to target creature's power. (This effect lasts indefinitely.)

{2}{U}{U}, {T}: Draw a card for each Wizard you control.

Mistform Ultimus is every creature type (even if this card isn't on the battlefield).

All Slivers have "{1}: This permanent becomes the creature type of your choice in addition to its other types until end of turn."

When Merchant of Secrets enters the battlefield, draw a card.

Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Master of the Veil is ...

Flying {T}, Tap two untapped Birds you control: Return target permanent to its owner's hand.

At the beginning of each player's upkeep, that player puts the top X cards of their library into their graveyard, where X is the number of cards in...

Flying Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

All Sliver creatures get +0/+1.

Noncreature spells cost {1} more to cast.

{T}: Target creature gets +X/+X until end of turn, where X is the number of Elves on the battlefield.

Untap all permanents you control during each other player's untap step.

Whenever a Sliver deals damage, its controller gains that much life.

Morph {X}{X}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Warbreak Trumpeter ...

Whenever Skirk Drill Sergeant or another Goblin dies, you may pay {2}{R}. If you do, reveal the top card of your library. If it's a Goblin permanen...

All Slivers have "{T}: Target Sliver creature gets +X/+0 until end of turn, where X is the number of Slivers on the battlefield."

{T}, Sacrifice a Goblin: Goblin creatures get +2/+0 until end of turn.

Goblin Goon can't attack unless you control more creatures than defending player. Goblin Goon can't block unless you control more creatures than a...

When Goblin Firebug leaves the battlefield, sacrifice a land.

{T}: Goblin Dynamo deals 1 damage to any target. {X}{R}, {T}, Sacrifice Goblin Dynamo: It deals X damage to any target.

{T}, Sacrifice a Forest: Add three mana in any combination of {R} and/or {G}.

Whenever Goblin Assassin or another Goblin enters the battlefield, each player flips a coin. Each player whose coin comes up tails sacrifices a cre...