Cortraevas: Perpetuality: 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.
 M 
Legendary Planeswalker – Samoset
+1: Creatures you control get +0/+2 until the beginning of your next upekeep.
0: Until the end of your opponent's next turn, creatures you control have "{t}: Gain 1 life."
-X: Creatures you control with a power of X or less you control gains indestructible until the beginning of your next upkeep.
1
 U 
Sorcery
Each opponent sacrifices a creature. If a player sacrificed a creature without any counters on it, that player discards a card and loses 3 life.
 U 
Artifact Creature – Serpent
Sunken Kingdom Stalker has Ward {1} as long as it's your turn.

Sacrifice a nontoken artifact: Sunken Kingdom Stalker can't be blocked until end of turn.
4/4
 U 
Artifact
{1}{w},{t}: Tap target creature. If that creature had one or more counters on it, target artifact creature you control gets +1/+1 until end of turn.
 C 
Artifact
{3},{t}: Tap target creature.

{6},{t}- Sacrifice Explosive Sensor Plate: Explosive Sensor Plate deal 4 damage to target tapped creature.
 C 
Artifact Creature – Merfolk Rogue
Whenever Sunken Kingdom Salvager deals combat damage to a player, you may pat {u}. If you do, draw a card, then discard a card.
Nothing goes to waste on Cortraevas. If it exists, it can serve a purpose.
2/2
 C 
Artifact Creature – Drone
Pursuit Drone enters the battlefield with a +1/+1 counter for each player that lost life this turn.

Pay 3 life: Pursuit Drone gains flying until end of turn.
0/0
 C 
Artifact Creature – Kithkin Cleric
{t}: Target artifact creature you control gets +0/+2 until end of turn. Gain 1 life. Activate this ability only when you could cast a sorcery.
1/2
 C 
Artifact – Equipment
Equipped creature gets +0/+2, vigilance, and Weld (When this creature would die you may pay {2}. If you do, put this creature on the bottom of your library and put a +1/+1 counter on target creature you control. ).

Equip {1}{w}
 C 
Creature – Spirit
First strike
When Vengeant Wandering enters the battlefield, you destroy target artifact.
Some died with dreams of the natural world in their heart, and their wandering soul cannot rest while the metal shell exists.
3/3
 C 
Sorcery
Vitality- If targets a nonartifact permanent, target creature you control gains haste until end of turn.

Deal 3 damage to target creature or planeswalker.
 C 
Artifact Creature – Golem
Weld (When this creature would die you may pay {2}. If you do, put this creature on the bottom of your library and put a +1/+1 counter on target creature you control. )
When Reprocessor Golem dies, Weld costs of permanents you control cost {1} less until end of turn.
5/5
 C 
Artifact Creature – Human Spider
Reach
Whenever a creature with flying dies, you may pay {2}. If you do, put a +1/+1 counter on Wall-Crawl Stalker.
1/4
 C 
Instant
Draw a card, and untap target noncreature artifact you control.
Álvarez' court would react and capture the planeswalkers while the other Iron Kings were preoccupied demonstrating their strength.
Island
 
 B 
Basic Land – Island

Samoset, Sudden Guardian (mythic)
Cost of Maintenance (uncommon)
Sunken Kingdom Stalker (uncommon)
Stalling Leg Cuffs (uncommon)
Explosive Sensor Plate (common)
Sunken Kingdom Salvager (common)
Pursuit Drone (common)
Steel Apostle (common)
Guardian Programming (common)
Vengeant Wandering (common)
Blasting Bolt (common)
Reprocessor Golem (common)
Wall-Crawl Stalker (common)
Álvarez' Response (common)
Island (basic)