The picture was made using lots of img2img and inpaint, i'm posting both the initial picture from txt2img and the final one.
basically, i did:

• txt2img, using RealCartoonXL, Add Detail XL and tthe Helldivers lora

• img2img to smooth it out, using the same prompt but without loras

• inpaint for the explosion on top and for the cup of tea

• krita for adding the text, i used this font: https://www.dafont.com/it/army-buster.font

• final upscale (4xNomos8kSCHAT-L)