Okay, so try to follow through, because it was so awesome!
It's turn 7, amongst other cards, I have the following in hand:
Bioshift, Corpsejack Menace, and Nykthos, Shrine to Nyx
On the field, I have:
1 Sylvan Caryatid, 1 Elvish Mystic, 1 Corpsejack Menace, 1 Garruk Wildspeaker, 1 Nykthos, Shrine to Nyx, 2 Overgrown Tomb, and 2 Forest.
I didn't play any land because Nyx was the only land in my hand so I used Garruk's +1, giving me a Corpsejack Menace, 1 Gyre Sage, 1 Sylvan Caryatid, and 2 Forest
After some time thinking, it began:
Tap 2 forests, tap Nykthos: 5 G mana from devotion.
Tap Tomb for a B, spend 3G from Nykthos to play the second Corpsejack - 2 floating G.
Play Nykthos, destroying the first and used the 2 floating G to tap it, now 6G mana from devotion.
Tap the second Tomb for a B, spend 3G to play the third Corpsejack - 3 floating G.
Used 2 floating G to play Gyre Sage from hand
Tapping Sylvan Caryatid on field + the last floating G let me cast the sylvan caryatid in hand, triggering Gyre Sage's Evolve.
1 counter for evolve, doubled by first Corpsejack (2 counters), doubled again by the second Corpsejack (4 counters), doubled again by the third Corpsejack (8 counters).
I swing with my first Corpsejack Menace which goes unblocked as my opponent went full swing at me the previous turn with a Brave the Elements
Tap Elvish Mystic, play instant Bioshift moving the 8 counters from my Gyre Sage to my Corpsejack, which triggers Corpsejack's ability:
8 counters doubled by first (16), second (32), and third Corpsejack (64).
I swing for 68 damage with a 68/68 Corpsejack Menace for the win!