Was battleing someone's Rift Boss node and they had a Peacock with the castparty MA unlocked. At some point Squigly tagged in, which procced it and made it unblockable. This instantly hit me for 75% of my health. This doesn't feel very fair, because there isn't much you can do besides taking the hit, which with 200% bonus Atk may just instantly kill you if you are unlucky. Not sure if there's any way to dodge an unblockable tagin, considering some spawn directly on you (like squigly), beside AI sometimes being unpredictable in their tag outs.