MScore: 10.0/10
Blasphemous Act
Sorceryrare
This spell costs 
less to cast for each creature on the battlefield.
Blasphemous Act deals 13 damage to each creature.
"Holy places are no longer sanctuary from death, and death is no longer sanctuary from anything." —Thalia, Knight-Cathar
Illustrated by Daarken · Innistrad · #130
Rulings for Blasphemous Act
4
2020-11-10
The total cost to cast Blasphemous Act is locked in before you pay that cost. For example, if there are three creatures on the battlefield, including one you can sacrifice to add {C}, the total cost of Blasphemous Act is {5}{R}. Then you can sacrifice the creature when you activate mana abilities just before paying the cost.
2020-11-10
Blasphemous Act's ability can't reduce the total cost to cast the spell below {R}.
2020-11-10
Although players may respond to Blasphemous Act once it's been cast, once it's announced, they can't respond before the cost is calculated and paid.
2020-11-10
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Blasphemous Act). The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
less to cast.
(You may cast this card from your graveyard for its flashback cost. Then exile it.)