You can also tap on the Installed tab, find XtraMath in the alphabetical list, and tap on it to go to the store page
Erebos can also come to life and battle with enough devotion, although Id advise against turning your Theros gods into creatures too often
Dawnbreaker Charioteers is an unusual choice, but its a human and protecting it with Ephemeral Shields is really interesting since you can play and protect it on turn 4, and you get a heroic trigger when you protect it if they try to kill it
This card is a little difficult to resolve for webcam play since the top four of your deck should be hidden information to yourself and only known information to one opponent
Creatures (44) Spells (16) Manaless Dredge is one of the most extreme strategies in all of Magic
An effective manabase can't contain only taplands, but there's always room for a few, and the utility on Bojuka Bog makes it well worth being one of them