Unmarked Grave A powered-down Entomb, Unmarked Grave is going to do much of the same things Entomb does, for a nonlegendary creature, slightly more expensively, and, more critically, as a sorcery
You could always Rite of Replication on Nyxbloom Ancient to see how much mana you can make in a single game
Surges Rattata, Kogas Weedle, Mistys Seel, Warp Point, Giovannis Meowth, Blaines Vulpix, Sabrinas Gastly (Gaseous Form), Mistys Staryu, Brocks Diglett, Kogas Zubat, Giovannis Nidoran f, Erikas Paras, Lt
As a sorcery, you may pay the mana cost of a locked door to unlock it.) Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life
This is not the same as an effect that creates a token, and any effect that refers to creating a token does not apply to copies of permanent spells
The untap effects also work very nicely with Timberwatch and give this elf deck a much bigger punch in combat