Here is the full list of all 33 Underworld Ascendant trophies - there are 16 bronze, 12 silver, 4 gold and 1 platinum.
Gain every trophy.
Enemies convinced to turn on each other.
Use the Wall Run skill along a 5-meter stretch of wall.
Cast a spell with 4 runes.
Kill a Bound enemy while time is slowed down.
Kill an enemy with a trap that had been blocked.
Defeated 5 enemies without being damaged.
Avoid death 3 times with the Iron Shirt and/or Shadow Step skills.
Leapt a horizontal distance of 15 meters.
Acquire the Sun Abyssal Key.
Make a 5000-silver piece sale to Aelita.
Make a 5000-silver piece purchase from Aelita.
Collect 90 Compendium entries.
Deal 10000 total damage with ranged attacks.
Deal 15000 total damage with melee attacks.
Deal 10000 total damage with axes/maces/hammers.
Deal 10000 total damage with swords.
Deal 10000 total damage with daggers.
Quench 5 torches with water arrows.
Hide in shadow cloud Deep Slug trail.
Deal 10000 total melee damage without weapons.
Deal 1000 total damage with each of swords, axes/maces, daggers, and unamred.
Stopped Typhon -- but at what cost?
Brought harmony to The Abyss.
Saved The Abyss a second time.
Stay to the bitter end.
Acquire the Heart Abyssal Key.
Acquire the Diamond Abyssal Key.
Acquire the Star Abyssal Key.
Acquire the Cross Abyssal Key.
Acquire the Pyramid Abyssal Key.
Descended into Pluto's Gate.
Escaped Pluto's Gate.