You have not cast a spell using Kess's ability this turn if Rise of the Eldrazi is in your graveyard.
Steps
1Cast Rise of the Eldrazi either from your hand or from your graveyard by paying , causing target player to draw four cards, and you to destroy target permanent, take an extra turn after this one and exile Rise of the Eldrazi.
2Move to your next turn.
3Activate Isochron Scepter by paying and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
4Resolve the Pull from Eternity copy, putting Rise of the Eldrazi into your graveyard from exile.