It is great with Vedalken Shackles and Crused Scroll and basically any useful artifact that has a high ongoing mana consumption
X: Exile target nonland permanent card with mana value X from your graveyard
Their Shard tokens are enchantments, setting off all kinds of other triggers when they hit the battlefield
They also have dedicated land support with Haven of the Spirit Dragon, Crucible of the Spirit Dragon, and Temple of the Dragon Queen, making it easy to support a 5-color dragon deck
This happens at times when you, as an experienced MTG Arena player, think "Oh, I'd better go into full control or set a stop on a phase where I don't normally get a stop." Except you don't, because smart priority does it for you
With plenty of solid low-cost characters and a number of cards that make it easy to keep flooding the board with them, Amber/Amethyst is all about overwhelming opponents with volume