Izuku yagi was neglected and bullied for being quirkless and his only friends were himiko toga , neito monama and hitoshi shinso and one time his tormentors had bullied him to hard and had destroyed him arm and they leave but then hydra finds him an...
We see the avenging league decorating the base for what reason you ask well because today is eri birthday and we see eri arriving with her friends kota , katsuma and Mahoro and izuku starts the party and kota asks
Kota:hey winter hood can you turn into that white monster
Eri:yeah turn into anti venom papa Izuku:ok
Izuku activates anti venom but once he turned full symbiot something came out of anti venom and attached itself to eri and then eri turns into a creature with some resemblance to anti venom
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Once anti venom see this he says
Anti venom:huh now I have a kid Izuku;anti what happened Anti venom:you know that I'm a perfect version of a klyntar right
Izuku:yeah Anti venom:well Klyntars can asexually reproduce Izuku:wait what Anti venom:let's hope it doesn't try killing us
Suddenly the symbiot on eri says
???:father Anti venom:hello uhh what do I call you ???:call me anti carnage father Anti venom:ok anti carnage are you gonna keep her safe
Anti carnage:yes I will Anti venom:ok you should probably change back to eri and also don't kill humans unless their criminals
Anti Carnage:ok father
Anti carnage then turns back to eri who has shocked eyes and anti venom turns back to izuku and says
Izuku:so I guess you have a strange gift now snowball
Eri:(nods) Izuku:this is odd Eri:I'm gonna play with my friends now
Eri then goes to play with her friends and the rest of the party was fun but odd since eri has a symbiot inside her body and after the day was over eri friends had to leave except for kota and they both slept in eri bed and Izuku says
Izuku:well I know who becoming my son in law Himiko:agreed
Both izuku and himiko go to their bedroom and fall asleep