This achievement is more difficult than all the other achievements in this game. you need to take 5 turns in a row with just the Chronicle of the Godslayer enabled.
I was playing 1 vs 1 against the computer.
Some tips to help you out
Watch the center deck, try to leave 5 cards left and let the computer play their turn. Once it is your turn, you can use the Tablet of Time's Dawn then start clearing the center deck.
Always makes sure you try to pick up all the artifacts, draw cards with bonus, and good cards for the end.
Don't overload yourself with Mystics, they will not help you in the end.
Get at least 2 ditch cards, so at the end, you can pick up the little cards, then ditch them right away.
You can watch my video to help you out with this achievement
Thanks
Killarpong