Caranthir spawns a 1-power copy of the card. If you decide to use Caranthir on Imlerith, then you get 1-point Imlerith, nothing more, nothing less. If you expect to trigger Imlerith's ability while spawning it with Caranthir, then no, this is not how it works. Imlerith's ability is triggered when the "Deploy" condition is met. Meaning, you need to play Imlerith card itself to be able to trigger its effect.