Generally, you won't want to or need to use Loot's burn damage effect, as the combos will do the burn damage for you
Between lords and cards like Kindred Dominance that care about creature types, you can find plenty of reasons to include this shapeshifter
Later, it can ping an enemy creature, delivering that last point of damage after combat to kill it off
Umori, the Collector Starting off cordial with the friendliest slime in Magic
(2023-06-16) If the creature you choose as your Ring-bearer was already your Ring-bearer, that still counts as choosing that creature as your Ring-bearer for the purpose of abilities that trigger "whenever you choose a creature as your Ring-bearer" or abilities that care about which creature was chosen as your Ring-bearer
And I'm not quite sure if it's the mouth doing this, or something else, but he looks too knowing, somehow