Resolve both Twilight Drover abilities, creating four 1/1 Spirit creature tokens.
Activate Ashnod's Altar twice by sacrificing two Spirits, adding CCCC.
When the Spirits die, Twilight Drover triggers twice, putting two +1/+1 counters on it.
Repeat.
This clever loop turns Twilight Drover into an unstoppable engine by leveraging Illusionist's Bracers to double its token output for a single counter's cost. Because Mycosynth Lattice ensures all permanents are artifacts, it seamlessly bridges any color constraints while letting Ashnod's Altar effortlessly chew up the newly minted Spirit tokens for an excess of mana. Sacrificing those tokens doesn't just fund the next activation—it also triggers Twilight Drover's growth, ensuring you always have the +1/+1 counters needed to keep the cycle spinning forever.