"Magic 2013", +m/can't\s(attack(\sor|,)\s)?block/, +!detain, +!unleash (7)
Enchant creature
Enchanted creature gets -1/-1 and can't block.
Whenever you cast a red spell, target creature can't block this turn.
Mogg Flunkies can't attack or block alone.
Enchanted creature can't attack or block.
Flying
Slumbering Dragon can't attack or block unless it has five or more +1/+1 counters on it.
Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on Slumbering Dragon.
Tormented Soul can't block and can't be blocked.
Veilborn Ghoul can't block.
Whenever a Swamp you control enters, you may return Veilborn Ghoul from your graveyard to your hand.
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