How do you summon elemental hero divine neos?

You'll need Polymerization, or another card that fuses monsters. You need to fuse any combination of the following: "Elemental HERO Neos" or "Elemental HERO Neos Alius", any other HERO monster (ie. Elemental HERO Sparkman, Destiny HERO Diamond Dude, Dark HERO Inferno Wing, Masked HERO Dian), a Neo-Spacian monster, and a Neo Space monster (ie. Neo Space Pathfinder). The conditions are that you must include a "Neos" monster, a HERO monster, and a Neo-Spacian or Neo Space monster.