You can always cast zero-mana creatures for free so when they get bounced after being targeted with Cowardice on the battlefield and triggering Nadu, you can re-cast to repeat the process
We Ride at Dawn costs 3 mana and grants your legendary creature spells convoke plus gives you the occasional 1/1 red Mercenary token in case your Commander attacks
These days it sometimes sees some fringe sideboard play in Eternal formats, but other than that its just collectability
If you want to build a particular deck, all you have to do is upload or import the decklist into Arena's deck builder or put the deck together yourself
Likewise with emblems, you need to have a death-triggering emblem for an extra triggered ability to happen
Amber/Emerald Playstyle It's hard to pin down exactly what kind of archetype Dogged and Dynamic is going for because it has a little bit of everything, but that just means it has some flexibility and can respond to your opponent's game plan in a variety of ways