Kiki-Jiki in exile (exiled by Agatha's Soul Cauldron).
Agatha's Soul Cauldron and Arwen on the battlefield.
You control at least one nonlegendary creature.
You control at least one creature that has at least one +1/+1 counter on it and that does not have summoning sickness.
Steps
Activate a creature you control with a +1/+1 counter on it using Kiki-Jiki's ability by tapping it, creating a token copy of any nonlegendary creature you control with haste that enters the battlefield with at least one +1/+1 counter on it due to Arwen.