Since using Polymerization and 5 Dragon-type monsters can often be not worth it, you can use Dragon's Mirror to make it more viable. You can use any Dragon monsters and when they get sent to the graveyard, use them as the fusion materials for Five-Headed Dragon.
Putting 5 Dragon-type monsters can be pretty slow, but you can make it run much faster by milling yourself with these cards. Magical Merchant can let you fusion summon into Five-Headed Dragon within the first few turns if you get lucky. The same with That Grass Looks Greener, but it can send the spell card to the graveyard. Cards of the Red Stone can be a good and safer approach since you can bring both Red-Eyes B. Dragon and Red-Eyes Zombie Dragon for a total of 6 Red-Eyes monsters.
Konami probably does but doesn’t give a shit about gamea
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