Multiverse Design Challenge: Virtual Booster

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This booster was generated with modern collation since the cardset contains mythics: 1 rare / mythic, 3 uncommons, 10 commons, 1 basic land, 1 token.
You could alternatively have 15 random cards regardless of rarity.
 R 
Instant
Counter target spell as long as it shares a complete word in its name with a permanent on the battlefield.
React Shun
{2}{u}{u}
 
 R 
Instant
Add the words "End the turn." to the text of target instant.
 U 
Creature – Elf Scout
Whenever Dangerlands Ranger attacks or blocks, you may search your library for a land card, put it into your graveyard, then shuffle your library.
2/2
 U 
Artifact
{t}: Add {1} to your mana pool.
{1}, {t}: Target creature gains your choice of flying, first strike, vigilance, haste, menace, deathtouch, or trample until end of turn.
 U 
Creature – Fox Ninja
Ninjutsu {1}{w}{u} ({1}{w}{u}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking unblocked.)
You may count blocked creatures as unblocked for the purpose of activating Moonlit Savior's ninjutsu ability.
2/2
 C 
Creature – Human Cleric
Abbey Monk gets +1/+2.
2/2
 C 
Creature – Human Warrior
When Kasimir, Lone Wolf enters the battlefield, put a Legendary 2/2 white Wolf creature token with First Strike named Cub onto the battlefield.
5/3
 C 
Instant
Destroy target creature.
Drain Dry costs {1} less to cast for each vampire you control.
 C 
Challenge
The current (real) Magic card types are instant, sorcery, creature, land, enchantment, artifact, and planeswalker. Wizards likes to include Tribal, but let's face it, it's not really a type like the others. Design a new card type.
 C 
Creature – Human Monk
Stunning Fist ({u/w}: Tap target creature blocking this creature. Creatures tapped this way don't untap during their controller's next untap step.)
2/2
 C 
Creature – Giant
Trample
When Giant Prick is blocked by two or more creatures, it loses trample until end of turn.
Kim: That old lady clearly stole my parking spot, and you totally took her side.
Greg: Kim, I just thought you were trying to squeeze into a space that didn't belong to you.
Kim: Nice, Greg, thanks. I'll remember that tonight when you try to squeeze into a space that doesn't belong to you.
5/5
 C 
Creature – Witch
Mayrant Schooner has +1/+0 for each creature you control with toughness 2 or less.
It's the little things that matter, dearie.
0/1
 C 
Ongoing Scheme
Whenever a creature you control deals damage to an opponent, exile that many cards from the top of that player's library. You may play cards exiled this way.
When you play a card exiled with this scheme, abandon it.
 C 
Creature – Goblin Pirate
When Goblin Digger enters the battlefield, dig 3 for a Treasure card with converted mana cost 3 or less. (Look at the top 3 cards of your library. You may reveal a Treasure card from among them with converted mana cost 3 or less, put it onto the hand and the rest onto the bottom of your library.)
1/1
 C 
Creature – Human Wizard
At the beginning of your upkeep, reveal the top card of your library. If it's a card, transform Delver of Basically Anything. (Otherwise, the nearest judge issues you a penalty.)
1/1
Aberration Upon **Magic**
 
 C 
Colour indicator U Creature – Horror
Flying
"A 1/1 for 1 seems on par. We don't actually have to test it, do we?" – WotC employee
3/2
 B 
 
Design 3 cards with a casting cost that includes the "purple" mana symbol. See Comments for more details.
 T 
Enchantment – Rune

Pun Intentional // React Shun (rare)
Dangerlands Ranger (uncommon)
Radioactive Goo (uncommon)
Moonlit Savior (uncommon)
Abbey Monk (common)
Kasimir, Lone Wolf (common)
Drain Dry (common)
Challenge # 031 (common)
Iron-Palm Adept (common)
Giant Prick (common)
Mayrant Schooner (common)
I Take Your Future For My Own (common)
Goblin Digger (common)
Delver of Basically Anything (common)
Challenge # 018 (basic)
Rune (token)