Star Trek Commander

Artifact Creature — Borg

Artifact creatures you control have "Whenever this creature attacks, each opponent loses 1 life and you gain 1 life."

Bio-Asset Allocator

Card

Thanos, the Mad Titan

Marvel Super Heroes Art Series

Marvel Super Heroes Commander

Legendary Creature — Villain

Menace
Whenever an opponent casts their first noncreature spell each turn, that player loses life equal to that spell's mana value.

The Frightful Four

Marvel Super Heroes

Creature — Vampire Villain

Flying
Power-up — {5}{B}{B}: Return up to one target creature card from your graveyard to your hand. Put two +1/+1 counters on this creature. (Activate each power-up ability only once. Reduce the cost by its mana cost if it entered this turn.)

Unliving Legionnaire

Instant

Destroy target artifact, creature, or planeswalker.

Bedevil

Alien Invasion

Alien

Enchantment

At the beginning of combat on your turn, create a 1/1 red Alien creature token with haste and "This token attacks each combat if able." Put a +1/+1 counter on it for each invasion counter on this enchantment, then put an invasion counter on this enchantment.

Legendary Creature — Eternal Villain

Deathtouch, lifelink
Power-up — {C}{W}{U}{B}{R}{G}: Put two +1/+1 counters on Thanos. Choose odd or even. Destroy each other creature with mana value of the chosen quality. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn. Zero is even.)

Return one or two target creature cards from your graveyard to your hand.
Basic landcycling {2} ({2}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Infernal Rebirth

Treasure

Creature — Human Mercenary Hero

When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
Whenever this creature attacks, you may sacrifice an artifact or discard a card. If you do, this creature gets +2/+0 until end of turn.

Contract Hero

Legendary Creature — Human Scientist Hero

Reach (This creature can block creatures with flying.)
Power-up — {4}{G}: Put two +1/+1 counters on Goliath. Then draw a card for each creature you control with power 4 or greater. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)