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