Divining Rod is a Weapon.
How to Get Edit
|•||On Play:||"What do you see?" — Talir|
Generally a deck is built around this card to allow for a high enough density of a keyword.
Cards that say "Your units have..." generally only effect what's in play, and not cards in deck unless otherwise specified. An exception to this is Talir, Who Sees Beyond, which gives units in your deck and in play Destiny.