A complete list of all Elder Scroll Blades enemy weaknesses, resistances and immunities. This info was datamined from an Early Access build of the game by Zeroghan.

Enemy Weakness Resistances
Ancient Dragons Slashing and Shock Cleaving, Poison, Breath damage type
Bandits Poison Frost and Shock
Bears Slashing and Shock Bashing, Frost and Poison
Dragons Slashing and Frost Cleaving, Fire and Poison
Dremora Raiders Slashing and Frost Cleaving, Fire and Poison
Dremora Warlocks Slashing and Frost Cleaving, Fire and Shock
Goblin Casters Bashing and Frost Fire and Shock
Goblin Warriors Bashing Poison
Mercenaries Poison Cleaving, Fire and Frost
Necromancers Poison Fire and Frost
Outcasts Cleaving and Shock Bashing, Fire and Poison
Skeevers Fire Shock and Poison
Skeletons Bashing and Shock Slashing, Fire and Immune to Poison
Spiders Cleaving and Frost Slashing, Shock and Poison
Spriggans Cleaving and Fire Bashing, Frost and Shock
Thalmor Agents Poison Slashing, Frost and Shock
Trolls Bashing and Fire Slashing, Frost and Shock
Warmasters Cleaving and Poison Frost and Shock
Wights Cleaving and Fire Bashing, Shock and Poison
Wispmothers and
Wisps
Fire Immune to Frost,
Resist Poison and all physical damage
Wolves Slashing and Shock Bashing, Fire and Frost

Datamined information

Ancient Dragons are weak to slashing and shock damage, but resist cleaving and poison damage, as well their breath’s damage type.

Bandits are weak to poison damage, but resist frost and shock damage.

Bears are weak to slashing and shock damage, but resist bashing, frost, and poison damage.

Dragons are weak to slashing and frost damage, but resist cleaving, fire, and poison damage.

Dremora Raiders are weak to slashing and frost damage, but resist cleaving, fire, and poison damage.

Dremora Warlocks are weak to slashing and frost damage, but resist cleaving, fire, and shock damage.

Goblin casters are weak to bashing and frost damage, but resist fire and shock damage.

All Goblin warriors are weak to bashing damage and resist poison damage, but additional weaknesses and resistances vary.

Mercenaries are weak to poison damage, but resist cleaving, fire, and frost damage.

Necromancers are weak to poison damage, but resist fire and frost damage.

Nether Liches are weak to slashing and fire damage, but resist all other damage types.

Outcasts are weak to cleaving and shock damage, but resist bashing, fire, and poison damage.

Skeevers are weak to fire damage, but resist shock and poison damage.

Skeletons are weak to bashing and shock damage, immune to poison damage, and resist slashing and fire damage.

Spiders are weak to cleaving and frost damage, but resist slashing, shock, and poison damage.

Spriggans are weak to cleaving and fire damage, but resist bashing, frost, and shock damage.

Thalmor Agents are weak to poison damage, but resist slashing, fire, and shock damage.

Trolls are weak to bashing and fire damage, but resist slashing, frost, and shock damage.

Warmasters are weak to cleaving and poison damage, but resist frost and shock damage.

Wights are weak to cleaving and fire damage, but resist bashing, shock and poison damage.

Wispmothers and Wisps are weak to fire damage, immune to frost damage, and resist poison and all physical damage.

Wolves are weak to slashing and shock damage, but resist bashing, fire, and frost damage.