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