Disney have revealed their upcoming trading card game called Lorcana, and although the card game isnt out yet, they have revealed information regarding the card rarities alongside rules, accessories and art
There are more powerful cards that also gain life out there not on this list however they are in some way worse at providing the life boost than these cards
While you're losing a card, you're gaining card quality and a bajillion extra mana
It blocks very well, and each time it hits someone, youll immediately gain 5 life not to mention that this extends the effectiveness of draining effects
Given how cheap the initial cost is and the big impact it has, leveling up this enchantment doesn't need to be a priority, but if you have a few creatures on the battlefield and want to let your hand build back up, you can focus on pumping mana into upgrades