According to ease and power I would say Red Nova its power is incredible and usually on its first turn it would have 5000+ atk, he can't be destroyed by anything and can negate attacks.
You can synchro summon Life Steam Dragon by tuning a lvl 1 tuner with Power Tool Dragon. ;)
Shooting Star Dragon requires a 'Tuner Synchro' monster and a Stardust Dragon as components. Typically that will be Formula Synchron + Stardust Dragon, that's the easiest way. You can play around with alternate methods though, they are very inefficient. Armory Arm can be made into a Lv2 Tuner Synchro using Lightwave Tuning and Demotion. Or there are cards of different levels that can somehow copy Stardust Dragon's name. But it's probably best to stick with Formula Synchron for now.
You have to Synchro Summon it, using a 'Synchro Tuner' (ie a Synchro monster who is also a Tuner, such as Formula Synchron) and two or more Non-Synchro Tuner monsters. The combined levels of the three or more components must add up to exactly 12 (Quazar Shooting Dragon's level).
No, it requires a a Tuner Synchro monster, meaning a Synchro monster who is also a Tuner, such as Formula Synchron. It is not asking for a 'Synchron' monster (although Formula Synchron happens to be one too) Quickdraw Synchron is not an appropriate Tuner for it because it is not a Synchro Monster.
You use it to summon a Fusion Monster, which has listed as one of its Fusion components, a Synchro Monster. For example, Dragon Knight Draco Equiste has '1 Dragon-type Synchro Monster' and '1 Warrior-type Monster' as material. So let's say you have a Black Rose Dragon in your graveyard and DD Warrior on the field. You activate Miracle Synchro Fusion, and then when it resolves, banish Black Rose Dragon and DD Warrior, and summon Dragon Knight Draco Equiste.
It's a Synchro monster, just Synchro Summon it as per the usual Synchro Summon rules (send 1 tuner and 1 or more non-tuners from your side of the field to the graveyard, with combined levels equal to the Power Tool Dragon).
I think it was Black Rose Dragon.
the best way is to get the "machine emperor" cards which are a bunch of anti-synchro union cards
There are over 30 synchro monsters but if you mean the 5 dragons they are Power tool dragon Stardust dragon Red dragon archfiend Black rose dragon Ancient fairy dragon Power tool dragon is the machine version of the real dragon that's name hasn't been released yet.
You Synchro Summon it with Tuner monsters and Non Tuner monsters that adds up to the level of the Black Rose Dragon. Since BRD is Lv7 you need monsters that would add up to that number.
No, Shooting Star Dragon requires Stardust Dragon and a Tuner Synchro, ie a Synchro Monster who is also a Tuner, like Formula Synchron. Nitro Synchron is a regular Effect Tuner Monster, not a Synchro Tuner Monster, so is an invalid Tuner for Shooting Star Dragon. About the only way around it is to have something like Armory Arm and Lightwave Tuning to turn itself into a Tuner, and then a name-changing monster gain the name of Stardust Dragon, but either way it must have a Stardust Dragon and a Tuner Synchro with a combined level total of 10.
Yes, you can. Shooting Quasar Dragon requires one 'Tuner Synchro' and two or more non-Tuner Synchro monsters. So you could use Formula Synchron as the 'Tuner Synchro' but you could not use a second, the rest must be non-Tuner.