Mana Confluence has its life tax baked into the tap text itself, whereas City of Brass has it separated as a standalone ability that deals one damage whenever it becomes tapped
This is because there will be times when you arent able to pay the spectacle price, and will get stuck with this card in your hand or paying full price for it
Getting in early damage helps you in a few ways
I have a series that's my favorite where I do a true Budget Commander where each deck must come under the previous budget
Pokemon in daily life Pokemon in daily life
Two creature types have strong enough synergies to show up later in the list, but there arent quite enough in angels, clerics, elves, legends, and vampires to create critical mass in a typal deck, but heres some of the good ones: Bishop of Wings Cordial Vampire Elvish Dreadlord Orah, Skyclave Hierophant Patron of the Vein Ratadrabik of Urborg Skemfar Avenger #19