Return all attacking creatures to their owner's hand.
{5}{U}{U}
Agent of Treachery
Creature - Human Rogue
When Agent of Treachery enters the battlefield, gain control of target permanent.
At the beginning of your end step, if you control three or more permanents you don't own, draw three cards.
2 /
3
{W}
Alley Evasion
Instant
Choose one --
• Target creature you control gets +1/+2 until end of turn.
• Return target creature you control to its owner's hand.
{2}{U}
Arrester's Admonition
Instant
Return target creature to its owner's hand.
Addendum -- If you cast this spell during your main phase, draw a card.
{1}{U}
Call to Heel
Instant
Return target creature to its owner's hand. Its controller draws a card.
{4}{U}
Chromeshell Crab
Creature - Crab Beast
Morph {4}{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 Chromeshell Crab is turned face up, you may exchange control of target creature you control and target creature an opponent controls.
3 /
3
{1}{W}
Cloistered Youth
Creature - Human
At the beginning of your upkeep, you may transform Cloistered Youth.
1 /
1
--
Unholy Fiend
Creature - Horror
At the beginning of your end step, you lose 1 life.
1 /
1
{5}{U}
Conjured Currency
Enchantment
At the beginning of your upkeep, you may exchange control of Conjured Currency and target permanent you neither own nor control.
{3}{B}{B}{B}
Cosmic Horror
Creature - Horror
First strike
At the beginning of your upkeep, destroy Cosmic Horror unless you pay {3}{B}{B}{B}. If Cosmic Horror is destroyed this way, it deals 7 damage to you.
7 /
7
{2}{U}
Daring Thief
Creature - Human Rogue
Inspired -- Whenever Daring Thief becomes untapped, you may exchange control of target nonland permanent you control and target permanent an opponent controls that shares a card type with it.
2 /
3
{1}{B}
Flesh Reaver
Creature - Phyrexian Horror
Whenever Flesh Reaver deals damage to a creature or opponent, Flesh Reaver deals that much damage to you.
4 /
4
{3}{B}{B}
Morinfen
Legendary Creature - Phyrexian Horror
Flying
Cumulative upkeep--Pay 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
5 /
4
{5}{B}
Morkrut Necropod
Creature - Slug Horror
Menace (This creature can't be blocked except by two or more creatures.)
Whenever Morkrut Necropod attacks or blocks, sacrifice another creature or land.
7 /
7
{4}{U}
Perplexing Chimera
Enchantment Creature - Chimera
Whenever an opponent casts a spell, you may exchange control of Perplexing Chimera and that spell. If you do, you may choose new targets for the spell. (If the spell becomes a permanent, you control that permanent.)
3 /
3
{2}{B}
Phyrexian Negator
Creature - Phyrexian Horror
Trample
Whenever Phyrexian Negator is dealt damage, sacrifice that many permanents.
5 /
5
{2}{B}{B}
Phyrexian Vatmother
Creature - Phyrexian Horror
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
At the beginning of your upkeep, you get a poison counter.
4 /
5
{3}{U}
Puca's Mischief
Enchantment
At the beginning of your upkeep, you may exchange control of target nonland permanent you control and target nonland permanent an opponent controls with an equal or lesser mana value.
{2}{U}{U}
Reins of Power
Instant
Untap all creatures you control and all creatures target opponent controls. You and that opponent each gain control of all creatures the other controls until end of turn. Those creatures gain haste until end of turn.
{2}{B}
Skittering Horror
Creature - Phyrexian Horror
When you cast a creature spell, sacrifice Skittering Horror.
4 /
3
{3}{B}{B}
Skittering Monstrosity
Creature - Horror
When you cast a creature spell, sacrifice Skittering Monstrosity.
5 /
5
{1}{U}
Snap
Instant
Return target creature to its owner's hand. Untap up to two lands.
{1}{U}
Snapback
Instant
You may exile a blue card from your hand rather than pay this spell's mana cost.
Return target creature to its owner's hand.
{2}{U}
Spawnbroker
Creature - Human Wizard
When Spawnbroker enters the battlefield, you may exchange control of target creature you control and target creature with power less than or equal to that creature's power an opponent controls.