Marvel Super Heroes

Instant

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
Helicarrier Strike deals 2 damage to target attacking or blocking creature. If this spell was cast using teamwork, it deals 4 damage to that creature instead.

Helicarrier Strike

Sorcery

Teamwork 4 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 4 or more.)
Choose one. If this spell was cast using teamwork, choose both instead.
• Street Justice — Exile target creature with toughness 4 or greater.
• Legal Justice — Exile target enchantment with mana value 4 or greater.

Murdock's Crusade

Leviathan

Teamwork 4 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 4 or more.)
Choose one. If this spell was cast using teamwork, choose both instead.
• Target player creates a 6/5 blue Leviathan creature token with hexproof.
• Return one or two target nonland permanents to their owners' hands.

Atlantis Attacks

Instant — Arcane

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
Counter target spell unless its controller pays {2}. Counter that spell unless its controller pays {4} instead if this spell was cast using teamwork.

We Say Thee Nay!

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
Exile target creature with mana value 3 or less. If this spell was cast using teamwork, instead exile target creature and you gain 3 life.

Cruel Alliance

Teamwork 4 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 4 or more.)
Choose target creature card in your graveyard with mana value 4 or less. If this spell was cast using teamwork, instead choose target creature card in your graveyard. Return the chosen card to the battlefield.

Too Evil to Stay Dead

Teamwork 3 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 3 or more.)
Choose one. If this spell was cast using teamwork, choose both instead.
• Target creature gains deathtouch until end of turn.
• Target creature gets -2/-2 until end of turn.

Widow's Bite

Teamwork 4 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 4 or more.)
Choose one. If this spell was cast using teamwork, choose both instead.
• Destroy target noncreature artifact.
• Target creature you control deals damage equal to its power to target creature an opponent controls.

HULK SMASH!

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
Repulsor Blast deals 5 damage to target creature. If this spell was cast using teamwork, it also deals 2 damage to that creature's controller.

Repulsor Blast

Teamwork 1 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 1 or more.)
Target creature gains double strike until end of turn. If this spell was cast using teamwork, that creature also gains trample until end of turn.

Team Tactics

Teamwork 5 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 5 or more.)
Reveal the top eight cards of your library. You may put a creature card from among them onto the battlefield. If this spell was cast using teamwork, put any number of creature cards from among them onto the battlefield instead. Put the rest into your graveyard.

Earth's Mightiest Heroes

Teamwork 3 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 3 or more.)
Choose one. If this spell was cast using teamwork, choose both instead.
• Put a +1/+1 counter on target creature.
• Target creature you control fights target creature an opponent controls.

Go Nuts!

Marvel Super Heroes Commander

Teamwork 3 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 3 or more.)
One or two target creatures each get +2/+1 until end of turn. If this spell was cast using teamwork, draw a card.

Heroic Teamwork

Enchantment — Aura

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
You may cast this spell as though it had flash if it's cast using teamwork.
Enchant creature
Enchanted creature gets -5/-0 and loses all abilities.

Quantum Reduction

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
Draw three cards. Then discard a card unless this spell was cast using teamwork.

Timeline Inquiry

Treasure

Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.)
Exile the top two cards of your library. Until the end of your next turn, you may play those cards. If this spell was cast using teamwork, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Crossover Collaboration

Teamwork 1 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 1 or more.)
Target creature gets +2/+2 and gains trample until end of turn. Also put a +1/+1 counter on that creature if this spell was cast using teamwork.