Hightend awearness (FOR MONKS ONLY)

once per long rest monks can expend a ki point to use there dex as there AC. This is used to doge atacks in stead of shruging it of like a palidin. The effect lasts for 1d6 rounds of combat. So if the monks dex was 20 and they rolled a 4 there AC for the next 4 rounds is 20. TO USE THIS YOU MUST BE A MONK