Every new set needs a new Mastery Pass, and March of the Machine's offers up tons of Booster packs, Gems, Gold, and cosmetics
It also happens to be a core part of its strategy
Griselbrand Pay seven life, draw seven cards
There are big speakers and party banners hanging above them
In a Standard environment, its not hard for Regal Bunnicorn to be a vanilla 4/4 or bigger

Let's see what the rough ratios are for Vampiric Bloodlust and how it compares: 37 lands and 6 ramp: Sol Ring, Boros Signet, Orzhov Signet, Rakdos Signet, Worn Powerstone, Black Market 43 mana: Mathas, Fiend Seeker, Skeletal Scrying, Damnable Pact, Read the Bones, Ambition's Cost, Syphon Mind, Skullclamp, Heirloom Blade, Well of Lost Dreams, Underworld Connections, Outpost Siege 11 sources of card advantage: Captivating Vampire, Dark Impostor, Anowon, the Ruin Sage, Patron of the Vein, Drana, Kalastria Bloodchief, Vein Drinker, Butcher of Malakir, Swords to Plowshares, Go for the Throat, Crackling Doom, Mortify, Consuming Vapors, New Blood, Return to Dust 14 single target removal: Fell the Mighty, Merciless Eviction 2 board wipes: Bloodline Necromancer 1 recursion: 0 tutors Bojuka Bog 1 graveyard hate: Blood Tribute and Kindred Charge 2 surprise "I Win" cards: Vampiric Bloodlust has a ton of ways to remove opposing creatures that could get in the way of your army