When I find suitable replacements for Groundshaker, this will become a Modern legal deck (Likely I will use the enchantment that gives creatures trample)

There are zero instants or sorceries in this deck by design. Starix's mutate ability can easily put a half dozen permanents on the batlefield in just 3 mutations. 10 on the forth mutation. By only using permanents, it ensures Starix's ability doesn't send cards to the graveyard.