Wizkids Rules!

If I have a Human Torch - Johnny Storm

While Human Torch is Active, Each time you field a character, Human Torch deals 1 damage to your opponent and one to a target character.

in the field and then I field a Storm - Wind Rider

When fielded, reroll up to 2 opposing characters. Each die that does not roll a character goes to your opponent's used pile. Storm deals 2 damage to your opponent for each die moved.

can I choose the order of "when fielded" effects, or would one take precedent over the other?

dmontgomery wrote:If I have a Human Torch - Johnny Storm

While Human Torch is Active, Each time you field a character, Human Torch deals 1 damage to your opponent and one to a target character.

in the field and then I field a Storm - Wind Rider

When fielded, reroll up to 2 opposing characters. Each die that does not roll a character goes to your opponent's used pile. Storm deals 2 damage to your opponent for each die moved.

can I choose the order of "when fielded" effects, or would one take precedent over the other?

Since the effects take place at the same time, you get to choose (as the player controlling both effects).

-The Dice Masters Rules Team