Here is the full list of all 31 Seraph trophies - there are 14 bronze, 10 silver, 6 gold and 1 platinum.
Transmute a MK4 weapon.
Kill the Herald at difficulty 6.0 and above.
Collect 50 story logs.
Defeat the final threat to Seraph.
Upgrade a Blessing to rank 5.
Transmute the MKII version of each weapon.
Collect 25 story logs.
Kill an 'enhanced' Elite (Bloody, Tainted, Dark).
Kill the Herald.
Obtain a Supreme Shard.
Score among the top 25% on a Daily challenge.
Score among the top 10% on a Daily challenge.
Score among the top 75% on a Daily challenge.
Equip a Miracle other than Orb or Repel.
Kill 50 enemies under the influence of the Double damage Orb
Reach 6 pips on the difficulty meter.
Kill 888 Daemons.
Post a score in Survival mode
Unlock a weapon, Ward or Miracle through Transmutation
Destroy a Fountain of Terminus.
Unlock Daemonsight through Transmutation
Attach a Shard to an Oath.
Kill 88 Daemons.
Slay a Lieutenant of Terminus.
Collect all other Trophies.
Collect 75 story logs.
Reach difficulty 8.0 in Survival or New Game.
Seraph is reborn.
Kill 8,888 Daemons.
Reach difficulty 9.0 in Survival or New Game.
Defeat the final threat to Seraph at difficulty 8.0 and above.