See Capital City Tower Cat.

The "once per turn" is weird. Because each object becomes a new object when changing zones "this spell" is always new, so the same spell can't be cast twice anyway...

Does this want to say something like "Gravecrawl only once each turn" instead?

II have updated Gravecrawler. Gravecrawler is not intended to be limited to a single creature card. This update allows now attempts to remember if a card with the name was cast from the graveyard. I do not know if that clause works and if its something allowed in paper Magic.

Idea: Since it would enter tapped anyway, having it enter exile instead and properly cast it on your next upkeep or next first main phase - suspend/rebound style.

Depends on what your goal with gravecrawler is.

Honestly, the goal is just to have another creature on the field. I didn't have a goal for the player beyond making the decision to have a creature return in a way that felt balanced and fair as a mechanic. Pushing sacrifice-powered cards in black would complement Gravecrawler.

I wanted players to be able to use Gravecrawler on any turn and I wanted it to be repeatable. Entering tapped and a life cost felt appropriate. That's mana and life loss to be open. Limiting use each turn is to avoid scenarios that could go infinite with the mechanic. I felt being doable once potentially each turn really gave off the feeling of those who've mastered the magics and skills of overcoming death.

This card was made as part of the cycle to see what a common card with the mechanic looks like. I decided that Gravecrawler is innately higher power at common as the other mechanics all require some interaction to do anything. Black's common thus became a bear.