Wargear Engineering

Scry 2, then draw a card. (To scry 2, look at
the top two cards of your library, then put any number
of them on the bottom of your library and the rest on
top in any order.)
Without the Earth caste, the farms would not produce
and the factories would sit idle. That's the ingenuity of
the finest craftsmen and engineers that allows the
complex T'au war machines to assert dominance on
the battlefield.