
Eddie Brock | Legendary Creature | Human Hero Villain | When Eddie Brock enters, return target creature card with mana value 1 or less from your graveyard to the battlefield.
{3}{B}{R}{G}: Transform Eddie Brock. Activate only as a sorcery. | Michael Phillippi

Electro, Assaulting Battery | Legendary Creature | Human Villain | Flying
You don't lose unspent red mana as steps and phases end.
Whenever you cast an instant or sorcery spell, add {R}.
When Electro leaves the battlefield, you may pay {X}. When you do, he deals X damage to target player. | Dmitry Burmak

Molten Man, Inferno Incarnate | Legendary Creature | Elemental Villain | When Molten Man enters, search your library for a basic Mountain card, put it onto the battlefield tapped, then shuffle.
Molten Man gets +1/+1 for each Mountain you control.
When Molten Man leaves the battlefield, sacrifice a land. | Tuan Duong Chu

J. Jonah Jameson | Legendary Creature | Human Citizen | When J. Jonah Jameson enters, suspect up to one target creature.
Whenever a creature you control with menace attacks, create a Treasure token. | Olivier Bernard

Superior Foes of Spider-Man | Creature | Human Rogue Villain | Trample
Whenever you cast a spell with mana value 4 or greater, you may exile the top card of your library. If you do, you may play that card until you exile another card with this creature. | Mirko Failoni

Spider-Gwen, Free Spirit | Legendary Creature | Spider Human Hero | Reach
Whenever Spider-Gwen becomes tapped, you may discard a card. If you do, draw a card. | Jesper Ejsing

Araña, Heart of the Spider | Legendary Creature | Spider Human Hero | Whenever you attack, put a +1/+1 counter on target attacking creature.
Whenever a modified creature you control deals combat damage to a player, exile the top card of your library. You may play that card this turn. (Equipment, Auras you control, and counters are modifications.) | Alexander Mokhov

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

Ultimate Green Goblin | Legendary Creature | Goblin Villain | At the beginning of your upkeep, discard a card, then create a Treasure token.
Mayhem {2}{B/R} (You may cast this card from your graveyard for {2}{B/R} if you discarded it this turn. Timing rules still apply.) | Caio Cacau

Scarlet Spider, Ben Reilly | Legendary Creature | Spider Human Hero | Web-slinging {R}{G} (You may cast this spell for {R}{G} if you also return a tapped creature you control to its owner's hand.)
Trample
Sensational Save — If Scarlet Spider was cast using web-slinging, he enters with X +1/+1 counters on him, where X is the mana value of the returned creature. | Alexandre Honoré

Kraven, Proud Predator | Legendary Creature | Human Warrior Villain | Vigilance
Top of the Food Chain — Kraven's power is equal to the greatest mana value among permanents you control. | Inkognit