Armor/Weap + El Rune = White armor/weap
Armor/Weap + Key = Socketed White Armor/Weap (Randomly rolls 1-6) works only on normal items.
Armor/Weap + Ethereal Dust = Eth armor/weap
TownPortal Book = cow level
Rune + Elixier of Downgration = next rune down
2 of the same rune = next rune up
2 of the same gem = next gem up
Armor/Weap + Zod rune = Indestructible armor/weap
Gift Box = random unique armor, weap, and rune. (during chrismas time)
Ironman Trophy = same as above, given out to winners of events.