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