It's important to note that cantrips with a delayed draw, like Balduvian Rage and Panic, are not good in Zada, Hedron Grinder decks, because you're looking to draw and cast all your spells in one big turn
Competitive cards can rise quickly when they become part of a top deck
This has the potential to get far more mana's worth of value than Arc Trail
Azure Beastbinder A fairly strong card in Bloomburrow Limited, Azure Beastbinder is a great way to keep one of your opponents threats in check
Lastly, since Zara reveals your opponent's hand and has access to blue mana, you can easily prepare counters for your opponents best spells
In Commander and casual formats, edicts really shine against Voltron decks that put all their resources into a single creature