My Universe, My Rules: 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.
You could alternatively have 15 random cards regardless of rarity.
The Law
{w}{2}
 
 R 
Enchantment
May is Must.

Every instance of the word 'may' on every thing in every zone is treated as the word 'must'.
When there is a choice of who 'may' do something, the controller of The Law decides the order in which they must do it.
Birchin
{g}{g}
 
 U 
Enchantment
+1/+1 counters are +2/+2 counters.
Prodigal Artificer
{2}{u}
 
 U 
Creature – Wizard
{t}: Deal 1 damage to any target.
Damage dealt to artifacts reduces their next activation this turn by that much colourless mana.
1/1
Just a moment
{u}
 
 U 
Instant
Counter target spell, unless its caster correctly recited its text without hesitation.
Repetition or deviation
Flying... birdmen?
{u}
 
 C 
Colour indicator U Creature – Bird
Signature
1/1
Aint Nothin
{g}
 
 C 
Creature – Dog Dog
Cryin til '21
1/1
Toughie
{g}{g}
 
 C 
 
While Toughie has toughness less than 4, it has +0/+4
And, uh, while it has +0/+4, it doesn't have +0/+4. Look, just equip it with a slagwurm armour already, before the stack explodes.
2/2
Cinderella (Mental)
{3}{u}{u}
 
 C 
Sorcery
Exile target permanent. Its controller may put another permanent that shares a type type with it into play. If they do, that permanent has vanishing, and enters the battlefield with two time counters.
Ditz Stone
{0}
 
 C 
Artifact
Ditz Stone isn't colourless.
Eternal Struggle
{b}{b}
 
 C 
Enchantment
Creatures cannot be blocked by creatures with higher converted mana cost.
Nons Now!
{2}{w}
 
 C 
Snow Creature – Nonsnow
Snow creatures cannot block nonsnow creatures. Nonsnow creatures cannot block snow creatures.
2/2
Crimson Kobolds
{0}
 
 C 
{R} Creature – Kobold
Crimson Kobolds is Red.
0/1
Touch of Flu
{b}
 
 C 
Instant
Target creature is summoning sick.
Too Quiet
{b}{r}
 
 C 
Enchantment
During each players upkeep, Too Quiet gains a charge counter.

Whenever a spell is cast, remove a charge counter from Too Quiet.

At each player's end of turn, that player loses life equal to the number of counters on Too Quiet.
Primordial Forest
 
 B 
Land
As long as you control a forest, creatures cost {g} less to cast.

The Law (rare)
Birchin (uncommon)
Prodigal Artificer (uncommon)
Just a moment (uncommon)
Flying... birdmen? (common)
Aint Nothin (common)
Toughie (common)
Cinderella (Mental) (common)
Ditz Stone (common)
Eternal Struggle (common)
Nons Now! (common)
Crimson Kobolds (common)
Touch of Flu (common)
Too Quiet (common)
Primordial Forest (basic)