Kreggentak

Origin
a Kreggentak is a weird creature that originated from the DarkRealm but accidentally made it's way to EarthRealm... the first time such thing appeared on screen is in Let us Brave Season 2 Episode 8 when Theo puked out a baby Kreggentak wich is a direct reference to Stanger Things when Will puked out a baby Demodog...

Appearance
it is born as a dark green larve that kinda lookslike a baby Demodog and maybe some alien species... they grow up pretty fast as it usually takes them 20 to 30 minutes to became light-ish green or dark-ish yellow and once they reach this state, it can take up to 5 minutes for them to moult into a full grown Kreggentak with wings and an Anteater based nose... they still have to get their shape and color right at this state but that usually takes up to 2 minutes...

Feeding
a Kreggentak eats everything that has blood inside... with their Anteater-ish nose they can smell blood from far away and recognize their loved once apart from their food and enemies.. they can't really see anything, wich is why they like to destroy everything in their way and never stop moving...

Weakness
like Zombies, their weakness is simple... chop off their heads... that's the only way... but it hasn't actually been confirmed that this kills them... for all we know, they could still be alive in this state... atleast they don't kill random people anymore in this state, so maybe it is for the best...