Multiverse Design Challenge: Virtual Booster

Sword in the Stone    R  Legendary Artifact – Equipment Protection from nonlegendary spells and permanents Equipped creature gets +3/+3 and has first strike and vigilance. Whenever a legendary creature enters the battlefield under your control, attach Sword in the Stone to that creature.	City Shield    U  Enchantment Whenever a source an opponent controls would deal damage to you, prevent all but three of that damage.	Aura Destabilizer    U  Creature – Dwarf Artificer Flash When Aura Destabilizer enters the battlefield, tap target aura. 2/3	Snake Pit    U  Land : Add to your mana pool. When Snake Pit enters the battlefield, you may pay . If you do, put a 1/1 black Snake creature token with deathtouch onto the battlefield.
Spitefire    C  Instant Deal 4 damage to target creature, really freakin remove Spitefire from the game forever. While Spitefire is really freakin removed from the game, opponents may cast it for . When they do, exile it.	My Ambition Never Ends  C  Scheme When you set this scheme in motion, until your next turn, whenever an opponent loses life, you may draw a card.	Sludge Skeletons    C  Creature – Skeleton Mutant : Degenerate Sludge Skeletons. (Exile Sludge Skeletons, then search your library for a Creature spell with a converted mana cost of 1 or less. Put that creature onto the battlefield under your control, then shuffle your library.) 1/1	Intellect    C  Blessing (Blessings aren't spells. You can only play one Blessing per turn and only when you could play a land. If you would control more than three Blessings, shuffle one into its owner's library.) Your maxium hand size is increased by two.
Werewolf Pet    C  Creature – Human Scout Hexproof Whenever another creature you control dies, you may transform Werewolf Pet. 2/2 Werewolf Devourers    C  Creature – Werewolf Beserker Lifelink 5/4	Potential Slayer    C  Creature – Human Scholar When Potential Slayer enters the battlefield, reveal the top four cards of you library and you may put a creature card from them on top of your library. Put the rest on the bottom in any order. 2/2	Siveixx    C  Creature – Shark If Siveixx gains flying until end of turn, you lose the game. Just be careful not to... 4/1	Ready Reserve    C  Combat Creature – Human Soldier Reserve (You may put this creature onto the battlefield blocking target attacking creature by paying its reserve cost. If you do, sacrifice it at the end of the combat phase. Play this ability only during combat after attackers are declared.) 3/3
Common nongreen creature    C  Creature – Bird Soldier Flying 1/1	Confused Orders    C  Instant Choose an attacking creature for each card in your hand. Those creatures are blocked. Language is the source of misunderstandings. - Antoine de Saint-Exupery	Challenge # 018    B    Design 3 cards with a casting cost that includes the "purple" mana symbol. See Comments for more details.

Sword in the Stone (rare)
City Shield (uncommon)
Aura Destabilizer (uncommon)
Snake Pit (uncommon)
Spitefire (common)
My Ambition Never Ends (common)
Sludge Skeletons (common)
Intellect (common)
Werewolf Pet (common)
Potential Slayer (common)
Siveixx (common)
Ready Reserve (common)
Common nongreen creature (common)
Confused Orders (common)
Challenge # 018 (basic)
Squirrel (token)