Does a card that targets units with specific Might values target on activation or only on resolution?

Ruling: The card targets a group of units when finalizing to the chain (on activation). On resolution, you form a subgroup from those originally targeted units that are still legal targets.

Sequence:

• Step one: Declare targets when the card is activated/finalized to the chain
• Step two: On resolution, if any targeted unit's Might has changed, form a subgroup of only the units that still meet the targeting criteria

Nuances:

• You can only choose from the originally selected targets at resolution; you cannot choose new units that weren't originally targeted
• If an opponent changes a unit's Might (e.g., with discipline), you must exclude that unit from the subgroup if it no longer meets the criteria