Seems like a very strong ability. I used to have a common in Magic 20XX that looked like this:

­
Creature - Thrull
Discard a card: Return ~ from your graveyard to your hand.
3/2

I had to nerf it. The ability, in draft, to keep dropping this creature, over and over again on the battlefield proved too good once the mid game hit. Every land was a 3/2 creature, so was every one and two cost card, as well as a few silver bullets. It was too much.

Had the card been a rare, though? Then, yeah, it might have been fine. Admittedly, it makes a boring looking rare. Kind of tough.

I can see that. I think that if I up the cost to 6-7 then it'll still be good but not too good. I mean you have to commit to bringing back the creature before you do nearly anything else in the turn. I work on trying to pin down how much the Restless ability should add to the cost of any given vanilla creature.

i think endless recursion is likely too good to be a keyword mechanic. unless you simply cost it out of reach, at which point nobody uses it.

My aim is to have it being the only keyword on the creature, and to allow you the option to always have at least one creature enter the battlefield.

There's always the option of splitting the casting cost and recur cost. I can definitely understand why you wouldn't want to do that... but I got to admit, the card would look spicier if it cost , but recurred for .

I think that would work. Know I've just got to figure out how to edit the mechanic so that the recur cost can be different on each card with the ability.

To do that, edit this card to say "[Reawaken ]". Edit the mechanic to set its "Parameters" number to 1, and edit the mechanic's text to say:

• "At the beginning of your upkeep, if this card is in your graveyard, you may pay \1. If you do, return it to the battlefield."
  or perhaps
• "At the beginning of your upkeep, you may pay \1. If you do, return this card from your graveyard to the battlefield."

Ok thank you very good to know.