draw that many cards, then you can Special Summon up to that many monsters from your hand, with different names, that are "Performapal" monsters, "Magician" Pendulum Monsters, and/or "Odd-Eyes" monsters, each with a Level between the Pendulum Scales of the 2 cards in your Pendulum Zones
Its not powerful in isolation, but it could be good in a very particular deck
As long as it sticks around, your creature spells cost less, which helps you in a big way
If a character is attacked successfully, the defending card is KOd and discarded to the players trash pile
Hymn is a cheap two for one and it is disruption which isn't something you can easily find on other cheap card advantage cards
Unfortunately, it only activates once a turn, but that's also going to stop you from accidentally killing yourself from decks slinging cheap spells