When you attempt to retreat, the game tells you that doing this is expensive, a waste of resources, and usually not a good idea
If you feel the need to hide your use of proxies, youve already got your answer as to whether or not you should be using them
With cards like Kruphix, God of HorizonsKruphix, God of Horizons, Inga and EsikaInga and Esika, Xolatoyac, the Smiling FloodXolatoyac, the Smiling Flood, and others, you can spend a lot of mana on other players' end steps to ensure they don't have as many opportunities to disrupt your game plan and to allow you to keep your own disruption spells castable at a moment's notice
Whats holding Ziatora back from being broken or banned in Magic: The Gathering 's 60 card formats is that it requires another creature to be on the battlefield