mtg cards like bitterblossom | Enchanting Tales you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying. Similar cards to Bitterblossom |

As a cosmic magical gem, it ought to be powerful, but this is downright overpowered

And let's not even talk about Rite of ConsumptionRite of Consumption

Creature - Unicorn Color tag templates(None) Lathiel, the Bounteous Dawn Lifelink At the beginning of each end step, if you gained life this turn, distribute up to that many +1/+1 counters among any number of other target creatures

In general, looting a card back to the top of your deck is worse than discarding a card (since you can't take advantage of any graveyard synergies), which means the +1 is only powerful with a very narrow subset of cards (things like Miracles)