That means you gain at least two permanents when it attacks, but you can bolster that greatly by simply adding in other sacrificial effects to your deck
You can see historic prices for every Card so you know which Lorcana Cards are increasing in price and which are dropping
If you're playing a deck that doesn't plan on attacking very much, it can climb you back to near 20 life with ease
It's Swords to Plowshares with a body, exiling a creature and giving the controller life equal to its power while also netting you a 3/2 lifelink creature
The 40 HP extra isnt bad either, especially with their flagship move Outrage
The result of these changes is that the hero team, with their powers combined, is on even footing with the archenemy, who stands alone in their path, creating a flavorful, fun, and balanced-for-Commander version of this classic Magic game mode