Magical Hack [Collectors' Edition] Zombie Giant and "this turn" and "until

and "this turn" and "until end of turn" effects end

−2: Gain control of target creature

Set: New Phyrexia Prerelease Promos Type: Legendary Creature — Phyrexian Praetor Rarity: Mythic Cost: {5}{B}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp

puts it on the bottom of their library

That player may copy this spell and may choose a new target for that copy

Magical Hack [Collectors' Edition] Zombie Giant and "this turn" and "untilSet: Collectors' Edition Type: Instant Rarity: Rare Cost: {U} Change the text of target spell or permanent by replacing all instances of one basic land type with another. (For example, you may change "swampwalk" to "plainswalk." This effect lasts indefinitely.)