Kovářství> Já si právě čtu FAQ a je tam napsáno:
.. and the extra damage is only dealt once, as you play the card from your hand.

Takže tento bonus se dá aktivovat při vykládání karty jednotky a je jen pro útok při vyložení, ne pro celý boj. - Malleus

Metalworking FAQ> "dealt only once" bylo ve FAQ v1. FAQ verze 2 říkají ve shodě s Wisdom and Warfare:

Q: The resource ability on Metalworking says, “When
playing a unit from hand, add 3 to the strength of its
attack.” What exactly does this mean?
A: This means that a player may use the resource ability before
playing a unit card in battle in order to have that unit deal 3
extra wounds if played into the same front as an enemy unit.
Thus, a strength 1 unit would deal 4 wounds to the enemy
unit in its front. The strength boost lasts for the entire battle,
making the unit harder to kill. - M@gic