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