Black Widow

With: Captain America (Infinity War)

Skill Champions: +250 Critical Rating on Basic Attacks.

With: Crossbones

All Champions: +115 Critical Damage Rating.

With: Daredevil (Classic)

All Champions: +5% Combat Power Rate.

With: Elektra

All Champions: +115 Critical Damage Rating.

With: Falcon

All Champions: +155 Critical Rating & +3% Attack rating.

With: Falcon (Joaquín Torres)

All Champions: +130 Armor Rating.

With: Hawkeye

Hawkeye: Gain Immunity to Poison Debuffs from Non-Mutant Champion. Black Widow: +7% Attack Rating.

With: Hercules

All Champions: +130 Armor Rating.

With: Hulk (Ragnarok)

Hulk (Ragnarok): When Struck Hulk has a 20% chance to ready a SMASH for his next attack. Black Widow: Evade chance increases by 100%.

With: Iceman

All Champions: +5% Perfect Block Chance.

With: Iron Man (Infinity War)

Everyone: Enemies are 35% less likely to evade Basic Attacks

With: Mangog

Mangog: While Enraged, Attacks deal a burst of Energy Damage equal to 6% of Modified Attack. #Avengers: Start the fight with an indefinite Passive Fury granting 10% Attack Rating.

With: Quake

Quake and Black Widow: +15% Ability Accuracy, Duration, and Potency.

With: Ronin

All Champions: +5% Combat Power Rate.

With: Scarlet Witch

All Champions: +6% Health.

With: Sentry

All Champions: +130 Armor Rating.

With: Shang-Chi

Synergy Champions: Landing a Critical Hit grants an additional +2% Critical Damage Rating. Max 100 hits.

With: Silver Samurai

All Champions: +155 Critical Rating.

With: Spider-Man (Miles Morales)

All Champions: +5% Perfect Block Chance.

With: Thor (Jane Foster)

All Champions: +130 Armor Rating.

With: Ultron

All Champions: +155 Critical Rating.

With: Void

Void: Fear of the Void activates at the start of the fight for 30 seconds against the Avengers. Avengers: +15% Attack Rating.

With: War Machine

All Champions: +5% Perfect Block Chance.

With: Yelena Belova

Yelena Belova: While the Opponent is suffering from a Bleed Vulnerability Debuff, they are also inflicted with a non-stacking 25% Sabotage Debuff. This Sabotage deals Direct Damage by inflicting Yelena’s Instant Bleed. Other Synergy Champions: Start each fight with an indefinite 35% Endurance Passive.