Cloudpost is basically an upgraded version of Tron that is easier to assemble (you don't need three different lands to get the benefit) and can make even more mana (three Cloudposts make nine mana, while Tron makes seven), with the drawback being that the lands come into play tapped
In a multiplayer format, Glorious End isn't really "take another turn" like it is in two-player formats
So, use Prismite to pay and get a blue mana, and copy Irencrag Feat with Nivix Guildmage
1 Non-foil wildcard of any rarity
The cheapest version is the alternate border from Dominaria United, with a $4 market price on TCGplayer
How many of them you play will vary depending on your budget, the colors of your deck, and your strategies and playstyle