Power of Dragons BIG STRONG DRAGON
Another quick aside: All the creatures with changeling that were turned over from design had the ability to change themselves in some way most often by changing their power or toughness (you'd be surprised how many basic ways there are to do this, from firebreathing to Looming Shade pumping to the Rootwalla ability) and all the spells changed something else (Giant Growth, Shrink, Afflict, and such)
The core of this deck revolves around a piece of tech first pioneered by Shadoll pilots, being the Valkyrie Engine
While you control a Link Monster(s), your opponent's monsters cannot target other monsters you control for attacks, also your opponent cannot target other monsters you control with card effects
The cards that boost consistency, and provide minor but meaningful advantages, all while not really taking up real card slots
Strap in, theres a lot to learn and a load of places to cover