The Dragons: Prowess of Age
Rarity: Rare, Precise: R3
Targets and cancels any effect which (declared earlier in the same chain of effects) that would cancel an attack from a unique Dragon manifestation. Alternatively, gives a prowess bonus to a Dragon or Drake attack (must be played before its strikes are assigned) dictated by the number of Prowess of Age cards played on the attack: +1 prowess if 1 played; +4 if 2 played; +9 if 3 played. "'...Then I was young and tender. Now I am old and strong, strong, strong.'"-Hob
Bold original.Against the Shadow: The Tormented Earth
Rarity: Uncommon, Precise: U3
Magic. Sorcery. Playable on a sorcery-using character facing a non-automatic-attack. Cancels the attack or gives the attack -3 prowess, your choice. Unless he is a Ringwraith, character makes a corruption check modified by -4. Cannot be duplicated against a given attack. "...as if...smitten with a shower of bolts and huge slingstones..."-LotRVI
Can Prowess of Age target The Tormented Earth?
As I see, declared The Tormented Earth neither would cancel attack, nor would give the attack malus to its prowess.
The choice (to cancel or to give malus) is made as part of main effect of The Tormented Earth.
EDIT: not all bold texts was marked as bold.