(Generic)Isekai/Dungeon Test concepts: Virtual Booster

Vosseirn, Mind Drinker    R  Legendary Creature – Vampire Boss Flying Tier 3 (Tier 3 creatures aren't legendary as long as you control a Tier 4 creature. Creature spells you cast with Tier 1 cost less to cast.) If you would put a card on the bottom of your library, you may reveal that card and exile it instead. If you do, each opponent loses X life and you gain X life, where X is the exiled card's mana value. 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	Chelsa, Titan Queen    U  Legendary Creature – Elephant Boss Ward Tier 2 (Tier 2 creatures aren't legendary as long as you control a Tier 3 or higher creature.) Spells and abilities your opponents control can’t cause you to sacrifice Chelsa, Titan Queen. 7/7	Blessing of Caustic Slime    U  Enchantment – Aura Enchant creature At the beginning of your endstep, remove any number of counters from the enchanted creature. For each counter removed this way, you may destroy target artifact or enchantment.	Underworld Vaguard    C  Creature – Demon Flying, haste If was spent casting Underworld Vaguard, create two 1/1 red Devil tokens with "When this creature dies, deal 1 damage to any target. 3/2
Angel Food Cake    C  Artifact Creature – Angel Food Flying When Angel Food Cake dies, if you may pay . If you do, target creature you control gains flying until end of turn. ,., Sacrifice this artifact: You gain 3 life. 3/5	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."	Hinterland Hell Raiser    C  Creature – Human Barbarian Hinterland Hell Raiser enters the battlefield with a trample and a reach counter if an artifact card you don't own entered a player's graveyard this turn. 2/2	Rumblo's Armorer    C  Creature – Goblin Minion Haste When Rumblo's Armorer dies, you may attach equipment at instant speed until end of turn. "A spear? We'll need these shields, and a hammer to break the shaft." -Rumblo, Second Floor Boss 1/1	Sea-Home Protector    C  Creature – Merfolk Wizard Whenever Sea-Home Protector attacks, you may untap target Island you control. If you control a Boss, you may untap target Lair you control instead. 3/3
Keen Senses    C  Enchantment Instants and sorceries you cast during your turn cost less. If an instant you cast during your turn targets a creature you control, that creature gains first strike until end of turn.	Blast-Wind Greeting    C  Sorcery Exile all instants and sorcery cards from all graveyards. Then, if ten or more instant and/or sorcery cards were exiled this way, put a flying counter on each Boss you control.	Bardel, Tentacled Emperor    C  Legendary Creature – Cephalid Boss Tier 1 (Tier 1 creatures aren't legendary as long as you control a Tier 2 or higher creature.) ,: Tap target creature. ,: Target creature gets -3/-0 until end of turn. When Bardel, Tentacled Emperor dies, if you control the untapped creature with greatest power you may cast a Boss from your hand as if it had flash. A Boss cast this way enters the battlefield with a flying counter. 5/3	Vivant Flare-Crest    C  Creature – Basilisk When Vivant Flare-Crest enters the battlefield, target Boss you control gains deathtouch and vigilance until end of turn. Flare-Crests are fierce monsters, but they can recognize heroic power. 5/2	Forest    B  Basic Land – Forest

Vosseirn, Mind Drinker (rare)
Demon Lord of Sadness (uncommon)
Chelsa, Titan Queen (uncommon)
Blessing of Caustic Slime (uncommon)
Underworld Vaguard (common)
Angel Food Cake (common)
Rebellion's Indoctrination (common)
Hinterland Hell Raiser (common)
Rumblo's Armorer (common)
Sea-Home Protector (common)
Keen Senses (common)
Blast-Wind Greeting (common)
Bardel, Tentacled Emperor (common)
Vivant Flare-Crest (common)
Forest (basic)