Eurogamerquote:The four Champion amiibo go on sale tomorrow and unlock an exclusive in-game helm with the following properties:
Vah Rudania Divine Helm: Flame Guard (Lv1)
Vah Ruta Divine Helm: Swim Speed Up (Lv1)
Vah Naboris Divine Helm: Electricity Resistance (Lv1)
Vah Medoh Divine Helm: Cold Resistance (Lv1)
Additionally, when equipped with the Ancient Cuirass and Ancient Greaves, all of the above four qualify for the Ancient Proficiency set bonus. You'll also get to see enemy health bars, as with the Champion's Tunic.