Here is the full list of all 27 Pox Nora trophies - there are 12 bronze, 8 silver, 6 gold and 1 platinum.
Obtain All Trophies
Reach Limited League in either the 1v1 or 2v2 Ladders
Complete a full set of Heroic Quests before time runs out
Win 40 Ranked Games
Reach Rare League in either the 1v1 or 2v2 Ladders
Win 20 Ranked Games
Defeat 10 Solo Play Campaigns on Legendary difficulty
Defeat 5 Solo Play Campaigns on Legendary difficulty
Defeat 3 Solo Play Campaigns at any difficulty
Kill an enemy relic with a spell
Win a Ranked Game with a Split Faction deck
Kill 5 Enemy Champions with a Transfigured Avatar
Win a Match where both players have transfigured Avatars
Win 5 Ranked Games with at least 3 Legendary runes in your deck
Win a Ranked Game with a K'thir Forest deck
Win a Ranked Game with a Forsaken Wastes deck
Win a Ranked Game with a Shattered Peaks deck
Win 5 Ranked Games using a deck with no duplicate runes
Win a Ranked Game with a Sundered Lands deck
Win a Ranked Game with a Forglar Swamp deck
Win a Ranked Game with a Savage Tundra deck
Win a Ranked Game with a Underdepths deck
Play 5 Custom Games
Kill an enemy champion with a spell
Win a Ranked Game with a Ironfist Stronghold deck
Win a Ranked Game with an Exotic rune in the deck
Win a Ranked Game with a Legendary rune in the deck