I don’t know how to make card images, but I had an idea for a card and wanted to share it.

“Cave of offerings” 1B Legendary Enchantment

Sacrifice a creature: put a food counter on the cave of offerings. Then if Cave of Offerings has 20 food counters on it, remove those counters and transform it.

(Other side)

Beast of the Depths

Haste, trample, indestructible

Whenever Beast of the Depths attacks, put a sleep counter on it. At the end of each turn, if Beast of the Depths has 3 sleep counters on it, remove those counters and transform it. 25/25

Any balancing ideas welcome! Edit: I was unaware of how transforming worked with counters.