Defender (This creature can't attack.)
This creature enters with X +1/+1 counters on it.

As an additional cost to cast this spell, sacrifice a creature.
Search your library for a card with the same name as target nontoken creature, put that card onto the battlefield, then shuffle.

As an additional cost to cast this spell, sacrifice a creature.
Return any number of target creatures you control to their owner's hand.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Target player discards a card.

Change the target of target spell that targets only a player. The new target must be a player.

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

Creatures you control have trample. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)

When a player casts a spell, sacrifice this enchantment and counter that spell.

Prevent the next X damage that would be dealt to target creature this turn. For each 1 damage prevented this way, put a +1/+1 counter on that creature.

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

Defender (This creature can't attack.)
First strike

: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

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

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Fanning the Flames deals X damage to any target.

Defender
When this creature enters, draw a card.

Whenever a creature blocks, this enchantment deals 1 damage to that creature's controller.

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

Buyback—Sacrifice a land. (You may sacrifice a land in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)
Prevent all combat damage that would be dealt this turn.

Defender (This creature can't attack.)
Whenever this creature is dealt combat damage, it deals that much damage to target opponent or planeswalker.

Distribute two +1/+1 counters among one or two target creatures.

Whenever this creature is dealt damage, it deals that much damage to target opponent or planeswalker.

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

Defender (This creature can't attack.)
Whenever this creature is dealt combat damage, you gain that much life.

Defender (This creature can't attack.)
Whenever this creature blocks a creature, return that creature to its owner's hand at end of combat.

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
Enchanted creature can't block.

Whenever you cast a spell, you gain 1 life.

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
Enchanted creature has flying.

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

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
Enchanted creature can't attack.

: Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)

At the beginning of each player's upkeep, that player discards a card at random.

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
All creatures able to block enchanted creature do so.

This creature enters with two +1/+1 counters on it.
, Remove a +1/+1 counter from this creature: Put a +1/+1 counter on target creature.
Remove a +1/+1 counter from this creature: You gain 2 life.

Whenever an opponent discards a card, this enchantment deals 2 damage to that player.

, : This artifact deals 1 damage to target creature. That creature attacks this turn if able.