Expect to see this a lot with Embercleave while it lasts, and in Commander, youd be daft not to try it in an Equipment build
decision matter
But i agree with you that Divine Reckoning might not be good enough so i thought that Promise of Loyalty might be a better fit as it gets around indestructible with the sac effect like Tragic Arrogance does but also means i get to keep my equipment and protects me from the creatures that survive
With a ward effect of sacrificing a creature, Vein Ripper was so good in formats like Pioneer and Explorer, that it caused Sorin, Imperious Bloodlord to get banned since the planeswalker could cheat out the Vampire as early as turn three
Pokmon still put in their really bad evolution lines, giving the Typhlosion line a 4-3-1 build
If you gain some life, you get energy, and you can use that energy to pay into the X part f the cost instead of mana