Just like the player, much of their success is based on the random element of the game
Apparently, Final Fantasy 13s protagonist, Lightning, needs at least five
If you cheat it onto the battlefield with Sorin, Imperious Bloodlord, you can skip its hefty 7-mana cost and get straight to the good stuff: conjuring a card from its spellbook to cast for free that turn
$5.99 Wall of Nets Exodus $2.29 Stalwart Shield-Bearers Rise of the Eldrazi $0.99 Wall of Denial Alara Reborn $3.99 The Pride of Hull Clade Murders at Karlov Manor $0.99 Shield-Wall Sentinel Dominaria United $4.49 Flumph Adventures in the Forgotten Realms $1.79 Serra's Blessing Weatherlight $2.99 Crystal Barricade Foundations $2.79 Plagon, Lord of the Beach Foundations Jumpstart $0.49 Vine Trellis Mercadian Masques $0.99 Wall of Junk Urza's Saga $0.49 Wingmantle Chaplain Dominaria United 0 results found
There might be another card out there with even more words removed from first printing to most recent wording, and maybe one day, the cards even on this list will see further changes
As such there are loads and loads of ways to build the Blood Artistry archetype and loads of subtle things you can do to improve it