It's possible to write more than one ad creative in adCore.
the adCore team best practice is to write at lease two versions of an ad to properly A/B test the creative and see which works best.
to make more than one version click on the +add new ad at the bottom of the right hand side of the 'Create Ads and Ad-Groups' section
* Please note that the settings at the top, denoted "automatically add' are the settings for all the ads in this campaign. e.g.you can't choose to automatically add