Getting King Dragun and Five-Headed Dragon out can create some powerful field setups and lead to victory by overwhelming opponents
Its obviously not the kind of card you play for the long game (although splice onto arcane does give it some surprising value potential), and the legendary only targeting rules push you even further towards narrow, focused deck building
Kraum, Ludevics Opus This is better than it looks because it does two things
Whilst its current use is controversial, the card itself is powerful
This way you can now browse through the whole library of MTG cards, filtered by sets, colors, rarity, type, text and converted mana cost
But that also reminds me: Its probably obvious and it's probably fine in your meta, but Coat of Arms is super-spooky in some playgroups