Health Gain Loop

Its just one big meme so... yea~

get a small wall of monsters or something you can stall with like beelze or dingi

set rainbow life

next turn if your opponent has a monster with 3000 or more attack more the better than syncrho summon colossal fighter

activate rainbow life

and use colossal fighter to suicide attack the bigger monster and you gain health for it.

Resummon colossal fighter via his effect and attack again and keep going till you're done.

Warning for dueling nexus players

This combo can break your game in a good way lol if you get past like I think it wa 720,000 health your opponents monsters all lose their attack permanently. Even if they summon new ones its always 0 so heads up for when you hit that level.