If a triggered ability is linked to a second ability, additional instances of that triggered ability are also linked to that second ability
You can use mutate creatures, such as Gemrazer and Sawtusk Demolisher as enchantments on Sarulf, and maybe something big enough you probably wont be exiling such as Ghalta, Primal Hunger since your commander himself should make dirt cheap to cast, but beyond that I find a combination of ramp, removal, and protection for Sarulf will suit you best
Switching your library for your graveyard is silly, but making your opponent do it is my kind of chaos
But where do you start with all these options
Due to this, theres technically a chance that cards like Miku, Divine Diva, or rather Elspeth Tirel, could be reprinted with a new reskin