Illusion: Chronos drops from Chronomatic Anomaly in the Nighthold. It can also be listed on the Black Market Auction House.
Here you can buy Illusion: Chronos for EU or US Servers.
Also you'll get guide for receiving Illusion: Chronos
Additional budget for Character transfer or Character boost to max level. BMAH Services in Shadowlands now requirement to have a max level character on server, so Trial character will not work.
Free time on evening, if you choose selfplay option