Since the cat is out, maybe moving from white to green is better.
Is twelve trials too much? Probably not, especially considering that the green one gives you a body.
Does that feel good? Is Hammerhand playable in current standard? Part of me doubts it…
On the other hand, the landbase in this deck feels horrible… It could definitely have some basics just so that you could play more lands untapped… There’s not much of a color requirement here, so maybe 14 sources for each color could be enough, which would allow for a few basics.