King is becoming a good Titan child. His blood keeps the portal working (For Luz to visit Her two families).

King: “There’s got to be a more better way to recharge the portal door. I’m still a growing little boy.” Eda: “But you’re my growing little boy!” King: “Love you too, mom!”

King: “I’m still young. I can’t pump out blood that fast.” Amity: (flies in and lands, holding Luz’s phone) “Batata, I got your phone. You nearly forgot it.” Luz: “Gracias, mi amore.” (kisses Amity) King: “Thank goodness you, Amity. Now go see my surrogate mother and sister.” Luz: “See ya!” (enter the door and it deactivates)

You know it was never revealed how the new portal door was powered and stuff whether by king’s blood or the collector’s magic(because of the “welcome to the boiling isles! Watch your step!” Recording that plays when you step through), so this is plausible.

Poor baby

King is really tired giving out his Titan blood to the door and yeah he do hates needles

Thankfully, I am pretty sure the door is not run off titan blood

Luz: What?, it has Lumity best photos King: Really? Luz: Hexsquad photos with Vee King: Seriously? Ren & Me: Come on, Luz are you kidding me right now? Luz: And, brother & sister photos King: That's what i wanted to hear ^^ King *hands Luz her phone* Here, sis ^^ Luz: Thanks, little bro ^^ *kiss King's forehead* i gotta go, Vee and Masha needs me with Amity ^^ King: Ok, see you, Luz ^^ *Luz dissapears through the Portal Door waiting Amity, Vee and Masha to go on double date* King: Phew, ok, now i can relax to regain some blood Willow, Hunter and Gus: Oh, hey, King, do you know where Luz, Amity and Vee around? King: Oh, they're going on a double date in the Human Realm and also, uh, guys, can you guys give me some space?, i need to relax to regain some blood Willow, Hunter and Gus: Oh, ok, and uh, sure, sorry for disturbing you, King King: It's alright

Lol I'm pretty sure that the portal door has a stronger power source then kings blood🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜💜🐉