(Generic)Isekai/Dungeon Test concepts: Virtual Booster

Yswang, Stern Host    M  Legendary Creature – Angel Boss Flying, lifelink Tier 4 (Tier 1 creature spells you cast cost less. Tier 2 creature spells you cast cost less.) Whenever you gain life, put a +1/+1 counter on each Angel you control. Enchanted creatures are Angels in addition to their other types. 6/6	Onvy, Brain Bane    U  Legendary Creature – Frog Boss Reach Tier 2 (Tier 2 creatures aren't legendary as long as you control a Tier 3 or higher creature.) Whenever Onvy, Brain Bane becomes the target of an instant or sorcery spell you cast, put a +1/+1 counter on it, then each opponents mills X cards, where X is the number of counters on Onvy. 3/6	Demon Lord of Sadness    U  Creature – Demon Flying At the beginning of your upkeep, each player loses 3 life unless that player has each creature they control get -1/-1 until end of turn. 5/5	Destroy Your Lair    U  Instant As an additional cost to cast Destroy Your Lair, sacrifice a Lair. Destroy target creature and a random creature controlled by the same player.	Adventurercatcher    C  Creature – Plant Whenever a land enters the battlefield under your control, gain 1 life. If a Lair entered the battlefield, Adventurercatcher gets +1/+0 until end of turn. 0/1
Foul Rotter    C  Creature – Zombie Whenever Foul Rotter or another Zombie enters the battlefield, up to one target creature you don't control gets -1/-1 until end of turn. You can't target a creature with this ability more than once each turn. 2/2	Rebellion's Indoctrination    C  Enchantment – Aura Enchant creature Enchanted creature has "When this creature dies, deal damage equal to its power to target player and creature that many Treasure tokens."	Baawlind, Future Eye    C  Legendary Creature – Efreet Boss First strike Tier 1 (Tier 1 creatures aren't legendary as long as you control a Tier 2 or higher creature.) When Baawlind, Future Eye dies, scry X, where X is the number of cards in your hand. 2/2	Psychopomp Punisher    C  Creature – Angel Flying At the beginning of your endstep, if you lost life this turn, target opponent exiles their graveyard. 3/3	Secret Enemy    C  Creature – Beast Barbarian Flash Secret Enemy can't be countered by spells or abilities. If a creature you control left the battlefield this turn, Secret Enemy costs less to cast. 3/3
Ready to Strike    C  Sorcery Put a vigilance counter on up to two target creatures you control. Then, each creature you control with vigilance gets +1/+1 until end of turn.	Axe Guardian    C  Creature – Human Warrior Vigilance Whenever Axe Guardian blocks one or more creatures, Axe Guardian gets +2/+2 until end of turn. "Greetings to Dualor, the largest city of the second floor." 2/4	Frilled Wonder, Sol-Allain    C  Legendary Creature – Lizard Boss Tier 1 (Tier 1 creatures aren't legendary as long as you control a Tier 2 or higher creature.) : Frilled Wonder, Sol-Allain gains vigilance until end of turn. ,: Put a +1/+1 counter on another target creature. When Frilled Wonder dies, if you control another creature with one or more +1/+1 counters, you may cast a Boss from your hand as if it had flash. If you do, that boss enters with two +1/+1 counters. 4/4	Axe-Guard Demon    C  Creature – Demon Knight Defender Whenever a Boss you control dies, you may pay . If you do, put a +1/+1 counter on Axe-Guard Demon. Vakir found Giedes' fortress more heavily guarded than she had imagined. 5/5	Plains    B  Basic Land – Plains

Yswang, Stern Host (mythic)
Onvy, Brain Bane (uncommon)
Demon Lord of Sadness (uncommon)
Destroy Your Lair (uncommon)
Adventurercatcher (common)
Foul Rotter (common)
Rebellion's Indoctrination (common)
Baawlind, Future Eye (common)
Psychopomp Punisher (common)
Secret Enemy (common)
Ready to Strike (common)
Axe Guardian (common)
Frilled Wonder, Sol-Allain (common)
Axe-Guard Demon (common)
Plains (basic)