Idea is very simple: Both
Feed the Hecaton and
Light the Beacon are great cards in unit-based meta (which is true mostly for current exp). All units here (except market) synergises well with those.
You can check if you like e.g.
Polymorph instead Ranchers Ruin. About maindeck, cull is kinda flex slot, I just liked some early draw at 2 power.
You can also experiment with powerbase but maxing on the marks gave me best results so far.
This deck took me from Gold 3 to Masters with some modifications from time to time. This is final version that I played thru Diamond 1.