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