So this style of Udyr requires you to play different to the typical sunfire aegis, tanky power farmer style of Udyr. Early on you play practically identical to normal Udyr, rushing Bami's cinder then eventually upgrading into your sunfire. However, we instead upgrade into Turbo Chemtank and procure boots of swiftness. This leads to some insane move speed, you still have immolate passive, you get tank stats which you like and the mythic passive now gives you ability haste unlike sunfire, which Udyr probably prefers. Now you have your predator boots and turbo chemtank, you can start running from the river or even behind your team's tower, then pop both turbo chemtank, predator boots and your E at the same time to run very fast towards an enemy, with predator also giving you extra damage. This makes your ganks pretty lethal as Udyr's normal problem is actually getting to the enemy even if they are poorly positioned. Once you land your E, you can switch to R and then just kill them straight up. Lich bane is another powerful item as it allows you to get more AP so your R does more damage as well as amplifying your movespeed and having spellblade so your autos still do a ton of damage. Once the laning phase is over, your goal is to try and assassinate people with your burst and movespeed, so pop your E, turbo and predator boots and run around their tank, you might draw his aggro instead of your team's which might be the best. Then identify the best target and dive them. In some ways, its similar to playing Rengar, you jump on them and they take a ton of damage, or just die. You are usually tanky enough that you can run away, and since their team is thrown into chaos by a furry barging into their backline at mach speed, your team should have an advantage and an easier engage into the fight. Otherwise, you should support your team by peeling for them with your stun and speed, able to jump infront of them like Braum and instead of holding a shield, you just punch them to deter their advances. You should also abuse tilt, if you are moving mach speed and can 1 shot one of their squishies, you can cause them to be unable to do anything most of the match. They might ask, 'why are you targeting me?' - you should respond with a witty comment and continue to do so, eventually causing them to either leave or focus fire you. This is great, as they are wasting their time chasing someone who is much quicker than them. If you distract their team by dancing around their jungle, you can pave way for free objectives, inhibs, csing - basically anything your team does in the time they chase you around will increase their likelyhood of winning, as they get further ahead while the other team wastes their time. As for things not to do, don't punch a tank, not respecting that you aren't running full tank, not respecting hard cc or zhonyas, don't sit in lanes if you have failed a gank, you are just wasting time and you have popped your two of your three best gank tools, predator and chemtank, don't permagank, you have a long cooldown on your items so make use of your fast clears and try to bully enemy junglers that can't 1v1 you while you wait, as when it comes back up your gank potential skyrockets. This isn't to say that you can't gank, and you should punish the 20hp anivia thirsting for tower plates even if your items are on cooldown. I feel like this playstyle rewards your gamesense rather than your mechanics, so if you want to have some fun, please try this out!