Mutagen morph clarification.

RAGUNAnoOne

I am very confused about the mutagen skill from the tooltip and I need clarification on what exactly it does.

it says that if an ally is under 20% health the HOT is consumed which I assume means negated

On the contrary it says <20%health allies are additionally restored blank health which by that means the other effect was still active

please help me understand as this can mean the difference

Allyhoo811

Basically, it just means that if an ally that is receiving the HoT from Mutagen dips below 20% health, the HoT time effect will stop and be replaced by an immediate heal of X amount. The thought being that that particular player is getting ready to die and needs a bigger boost to health right at that second rather than smaller heals that maintain his/her health over a period of time.