LadyAwesome45321: Yes, it is such a shame that the show never truly delved deeper into this. Then again, there were other characters out there as well and they didn't find the time or think this was worth addressing. Thanks for the review!
Manipulator
A chance had been presented to him, but he created all other chances for himself. After all, the perfect opportunity rarely every falls into someone's lap and such events need to be cherished. But you'd also have to work hard to get chances and make the most out of your work towards the incredible opportunity.
Leonard Snart was very much aware of this. Being recruited to stop an immortal and be a hero? He was not the hero type, but there was this opportunity he could not refuse: traveling through time. It wasn't so much the people he'd meet that drew him in, but the thought that he could go to unguarded moments in history and steal valuables at the right time.
Yet, it required patience and compromise. He couldn't just steal the jumpship and set off on his quest; they'd ask questions. He'd have to actively try to stop the immortal man to win their trust and then - when he had it - he could run off.
Sometime later, Snart set his eyes on something bigger than the jumpship: the Waverider itself. But to get the ship into his hands, it would be unwise to call for a mutiny. Again, he needed to be patient and discrete.
As such, he whispered lies in the ears of his fellow Legends. He did not make them too far-fetched, and whenever someone was openly mad at someone else, he put extra fuel on the flame. It was an easy strategy to make sure the Legends didn't become too friendly with one another. Sometimes, someone would tell him 'they didn't need to know that', but nobody accused him of keeping this tense situation around, nor did they believe he was manipulating them.
Well, everyone but Mick. He knew Leonard Snart well enough to know every word coming out of his mouth was carefully considered, and every sentence masterfully crafted. Everything he said had a purpose, and Mick easily saw that purpose. But he kept quiet about the situation; after all, Snart hadn't tried to make Mick angry at the other Legends and vice versa. Besides, it was way too fun to watch to call Snart out on his behavior.
It was all meticulously built up, slowly over time. It was a true delight to watch the team fall apart in such a natural way. All Snart had to do now was to stand back and watch.
Everyone yelled at everyone. They weren't on the Waverider, but someplace where Vandal Savage was supposed to be soon. Rip, Kendra and Ray were the only ones who tried to calm the others down. so Mick just punched Ray in the face to shut him up, which in turn brought the attention to Mick – "I saw a chance and grabbed it".
Savage arrived, and the Legends were no coherent team. Despite their combined efforts, they were no match against Savage. Ray had to pay for it with his life – neither Snart nor Rory minded this turn of events. Vandal left the scene victorious, and the Firestorm duo, as well as Sara Lance, wished to return to the present. Rip fulfilled their request.
Not much later, Leonard took control of the situation and murdered Rip, blasting ice through his chest. Mick brought Kendra out of the Waverider as well, on orders from Snart. Since this path of glory was only meant for the one person, Len left Mick in the present as well, setting off on his own.
Throughout history, both the past and the future, nobody knew what to make of this mystery thief. He came, he stole, and then he vanished from the face of the Earth. He still is the most fascinating legendary figure in historical research, but nobody could piece together what exactly was going on and how this could happen.
Well, nobody but Nate Heywood, but he'd never have the chance to confirm his theories. Leonard Snart lived forever in the minds of those who know of his miraculous thefts and many aspiring criminals who look up to his example.