Here is the full list of all 30 Seraph achievements.
Transmute a MK4 weapon.
Kill 8,888 Daemons.
Score among the top 10% on a Daily challenge.
Collect 75 story logs.
Seraph is reborn.
Score among the top 25% on a Daily challenge.
Upgrade a Blessing to rank 5.
Defeat the final threat to Seraph.
Obtain a Supreme Shard.
Collect 50 story logs.
Transmute the MKII version of each weapon.
Score among the top 75% on a Daily challenge.
Reach difficulty 8.0 in Survival or New Game.
Equip a Miracle other than Orb or Repel.
Post a score in Survival mode
Reach 6 pips on the difficulty meter.
Collect 25 story logs.
Kill an 'enhanced' Elite (Bloody, Tainted, Dark).
Kill the Herald.
Kill 888 Daemons.
Kill 50 enemies under the influence of the Double Damage Orb
Unlock a weapon, Ward or Miracle through Transmutation
Destroy a Fountain of Terminus.
Attach a Shard to an Oath.
Unlock Daemonsight through Transmutation
Kill 88 Daemons.
Slay a Lieutenant of Terminus.
Kill the Herald at difficulty 6.0 and above.
Reach difficulty 9.0 in Survival or New Game.
Defeat the final threat to Seraph at difficulty 8.0 and above.