after a boss run breaks your spirit What you give up Consistency
The deck has many ways to activate its ability and due to the life-gain triggers being separate from each other, it is not uncommon to receive 2 to 3 +1/+1 counters on all of our creatures in a single turn
The opponents creature or permanent you enchant has to have mana value less than the aura for you to steal it
If you dont, you are basically sacrificing your own creatures for a trade-off or, well, you are not killing anything
Even a repeatable Lightning Bolt can do some real damage
Bloodthirsty Conqueror, however, serves as both a potent combo piece and a powerful standalone threat, making it much easier to integrate this life-drain combo into a competitive deck