The ability to make two-drop artifact creatures free is massive, and paired with the capacity to make other colorless cards cheaper by gaining life from other sources, Ezzaroot Channeler might have potential in decks which run Eldrazi creatures or other such beasties
However, you can still only cast a face with a mana value that's lower than the original spell
Arwen Undmiel Rating: 7/10 Given the elven theme of scrying, this is an excellent payoff for the archetype that becomes a decent enabler in the late game too
When paired with repeatable effects that can repeatedly cause you to gain life each turn, this creature can become quite an imposing offensive threat whilst helping to smooth out your draws, ensuring you have just what you need on your next turn
Then they are then not considered to have a name
Flip a coin after the damageheads means its all better