This is a build-around card that needs a particular commander, like this sets Magus Lucea Kane, The Swarmlord, or just an old classic like Animar, Soul of Elements
And beyond that, there's always the extended universe that can be tapped into as well
The idea being that you would gain the 20 life and then give it to your opponent, so when they couldnt pay they upkeep, they would lose 20 life and essentially the game
Maybe my favorite part of the deck is how well Glorious End works with Nahiri, the Harbinger
But thanks to all of our defenders and the flock of Birds Wingmantle Chaplain makes, our deck is actually very good at staving off death for a few turns by playing defense
Not super flashy or flexible, but it doesnt make you jump through any additional hoops either