Almost every cost reduction ability is hard to balance, and similar stuff happened with delve on banned cards like Treasure Cruise and Dig Through Time
Like Bazaar, this Vintage all-star land doesn't tap for mana by itself, so it potentially sets you back mana unless you pair it with a card like Urborg, Tomb of Yawgmoth, but its effect is well worth it: all creatures have "At the beginning of your upkeep, destroy this creature unless you pay 1." So anyone with creatures will have to commit a chunk of mana keeping their creatures alive or remove them, with the more mana they have the more they gotta pay
Compost Note that Compost triggers off mill, making this a reasonable card to spec on in decks that like enchantments or based on your local meta
Good luck out there
Although it takes a little more time than with a card like Bloodbraid Elf, you stand to gain both value and tempo with Pia and Kiran Nalaar fighting for you
If damage would be dealt to that creature this turn, prevent that damage and put that many +1/+1 counters on it