While Thor of Higher Avalon is active, at the start of your opponent's attack step, deal 2 damage for each Team Affiliation in their Field Zone, divided any way you choose among their characters.
and targeting is defined in the shiny new comprehensive rules as
3.3.1 When an ability that affects a specific number greater than zero of Character dice requires you choose
at least one Character die, or explicitly uses the term “target die/dice”, it is a targeting ability.
Since Thor's ability does not affect a specific number of Character dice, it seems that it is not a targeting ability according to the definition, so would it be correct to assume this ability gets around things like Thing: The Shield?
While Thing is active, your opponent can't target your other character dice.
Thanks in advance for your answer and thanks for making the comprehensive rules available!