
Alien Symbiosis | Enchantment | Aura | Enchant creature
Enchanted creature gets +1/+1, has menace, and is a Symbiote in addition to its other types.
You may cast this card from your graveyard by discarding a card in addition to paying its other costs. | Helge C. Balzer

Spider-Man Noir | Legendary Creature | Spider Human Hero | Menace
Whenever a creature you control attacks alone, put a +1/+1 counter on it. Then surveil X, where X is the number of counters on it. (Look at the top X cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) | Michele Giorgi

Sandman's Quicksand | Sorcery | | Mayhem {3}{B} (You may cast this card from your graveyard for {3}{B} if you discarded it this turn. Timing rules still apply.)
All creatures get -2/-2 until end of turn. If this spell's mayhem cost was paid, creatures your opponents control get -2/-2 until end of turn instead. | Mathias Kollros

Tombstone, Career Criminal | Legendary Creature | Human Villain | When Tombstone enters, return target Villain card from your graveyard to your hand.
Villain spells you cast cost {1} less to cast. | Carlos Palma Cruchaga

Prison Break | Sorcery | | Return target creature card from your graveyard to the battlefield with an additional +1/+1 counter on it.
Mayhem {3}{B} (You may cast this card from your graveyard for {3}{B} if you discarded it this turn. Timing rules still apply.) | Hristo D. Chukov

The Spot's Portal | Instant | | Put target creature on the bottom of its owner's library. You lose 2 life unless you control a Villain. | Warren Mahy

Scorpion, Seething Striker | Legendary Creature | Scorpion Human Villain | Deathtouch
At the beginning of your end step, if a creature died this turn, target creature you control connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.) | Dmitry Burmak

Prowler, Clawed Thief | Legendary Creature | Human Rogue Villain | Menace (This creature can't be blocked except by two or more creatures.)
Whenever another Villain you control enters, Prowler connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.) | Cristi Balanescu

Vulture, Scheming Scavenger | Legendary Creature | Human Artificer Villain | Flying
Whenever Vulture attacks, other Villains you control gain flying until end of turn. | Josh Hass

Morbius the Living Vampire | Legendary Creature | Vampire Scientist Villain | Flying, vigilance, lifelink
{U}{B}, Exile this card from your graveyard: Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. | Andrey Kuzinskiy

Shriek, Treblemaker | Legendary Creature | Mutant Villain | At the beginning of your first main phase, you may discard a card. When you do, target creature can't block this turn.
Sonic Blast — Whenever a creature an opponent controls dies, Shriek deals 1 damage to that player. | Billy Christian

Scarlet Spider, Kaine | Legendary Creature | Spider Human Hero | Menace (This creature can't be blocked except by two or more creatures.)
When Scarlet Spider enters, you may discard a card. If you do, put a +1/+1 counter on him.
Mayhem {B/R} (You may cast this card from your graveyard for {B/R} if you discarded it this turn. Timing rules still apply.) | Alexander Mokhov

Green Goblin, Revenant | Legendary Creature | Goblin Human Villain | Flying, deathtouch
Whenever Green Goblin attacks, discard a card. Then draw a card for each card you've discarded this turn. | Daren Bader