Damrod is a relatively recent addition to the Ithilien Ranger/Trap archetype, but has instantly become an auto include in it, as well as any other deck that uses traps.
Damrod solves two of the major problems associated with using traps:
- Traps are a little on the expensive side.
- Traps take up valuable deck slots that might be better used for Lore's amazing events and allies.
Damrod helps alleviate both with his abilities. Making traps cheaper (cheap-as-free with Master of Lore [Yes, I still like him, nerfs and all]) makes you more willing to spend your valuable Resources on fiddly control-cards, and the card draw solves the deck-slots issue.
My only worry about this amazing card is that now all future traps will have to be balanced around him, and I fear that they will be over-costed (more than current traps are) to compensate for Damrod's ability.