Warlock and the Infinity Watch

Having agreed to separate the Infinity Gems to prevent any single being from posessing their awesome cosmic power, Adam Warlock goes about gathering those that he feels he can trust with the great power that even a single gem grants. Gathering them together on a nameless world, he gives the Mind gem to Moondragon, augmenting her already strong mental powers. He gives the Space gem to Pip the Troll. To Drax the Destroyer, he gives the Power Gem. And to Gamora, he gives the Time gem, confident that even if she never uses it, she will keep it safe. The Soul Gem he keeps for himself. But that only accounts for five of the six Infinity Gems. Where is the Reality gem?