Royal Assassin [Revised Edition] Swamp you may change "swampwalk" to

you may change "swampwalk" to "plainswalk

if you have no cards in hand

they put the top card of their library into their graveyard

if it had no -1/-1 counters on it

Set: Scars of Mirrodin Type: Artifact — Equipment Rarity: Mythic Cost: {3} Equipped creature gets +2/+2 and has protection from green and from blue

Royal Assassin [Revised Edition] Swamp you may change "swampwalk" toSet: Revised Edition Type: Creature Human Assassin Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature. Trained in the arts of stealth, the royal assassins choose their victims carefully, relying on timing and precision rather than brute force.