You play lands, creatures, and sorceries during your main phases, announce attackers, pass your turn, and play the exact same way youd play a normal game of Magic
Each set cube is built to make repeat drafts feel close to the real environment
Not only does this commander allow you to play your big creatures faster, it also gives them trample if they dont already have it
Magic: The Gathering Comprehensive Rules, 702.16
If you controlled at least two artifacts when you declared Brazen Blademaster as an attacker, it doesn't matter how many you control as its ability resolves
Each Elf you control gives Imaryll +1/+1 until end of turn, and it can assign damage to a player rather than the creatures blocking it