Well the only problem right now is that this card is completely overshadowed by Graboid. Unupgraded graboid costs 1 less for the same attack and also evolve. Upped graboid costs 1 less for 1 less damage but still with evolve at an even stronger level. (Although some would say this is an issue with graboid, not your card, but that argument is for another thread.)
As is, it needs a little more in the way of an ability. There isn't much synergy between Life and Earth to be had, if Earth has a strictly superior card in its own inventory. Kind of like a Air/Aether duo. You could use shockwave, but your deck doesn't freeze and barring that you have a strictly superior option right in aether via lightning bolt.