The deck then adds a ton of different wrath effects (Star of Extinction, Razia, Austere Command, Blasphemous Act, Day of Judgment, etc) to deal with any threats your opponents might be able to cast prior to you repeatedly wiping the board of lands
Blood tokens seem to be a core part of the Rakdos identity, which makes sense because that guild is all about Vampires, who, well, need blood
Its not, but it could be
Give it a try on ladder or at your local gaming store and see how it performs for you.
Decks with draw effects like this often struggle with stabilizing the board before an opposing deck manages to kill them, so it's nice to see Mending shore up this weakness slightly
The most powerful Ramp spell ever printed is Tinker because it allows you to cheat on mana to accelerate out a gigantic threat