The Conjure Ice Beast I spell from Frostburn is pretty good. You summon an icy construct of any creature of the SNA I/SM I list. E.g. an Ice Beast Wolf compared to a normal Wolf gains ~17 hp, +2 AC, loses Trip attack but gains one icy Special Attack from a interesting list, e.g. Cold Aura (1d6 cold damage to all within 10 ft., free action at the beginning of its turn each round).
1d6 automatic cold damage/round to all creatures within 25 ft. diameter is quite decent on very low levels. And the beast can also attack, flank, and possibly even take some hits.