Here is the full list of all 20 Spellweaver achievements.
Play 20 Ranked games.
Win a game by having 40 or more life.
Win a game after playing at least one card from each aspect.
Win a game at 1 life.
Win 7 Friendly or Ranked games in a row.
Win a game that lasted at least 7 turns, without receiving any damage.
Win a game by depleting your opponent's deck.
Play 100 games.
Unlock all quest points on the World Map.
Complete 5 Epic quests.
Collect one copy of each Order card from Valiant Dawn.
Collect one copy of each Wisdom card from Valiant Dawn.
Collect one copy of each Nature card from Valiant Dawn.
Collect one copy of each Rage card from Valiant Dawn.
Collect one copy of each Dominion card from Valiant Dawn.
Collect one copy of each Corruption card from Valiant Dawn.
Reach a rating of 1250 or more points.
Complete 5 Spellweaver Trials.
Reach 10 Wins in a Spellweaver Trial.
Unlock the Spellweaver fame title. (Reach Fame Level 35)