Persistent Marshstalker gets +1/+0 for each other Rat you control.
Threshold — Whenever you attack with one or more Rats, if seven or more cards are in your graveyard, you may pay
![2](/Handlers/Image.ashx?size=small&name=2&type=symbol)
![Black](/Handlers/Image.ashx?size=small&name=B&type=symbol)
. If you do, return Persistent Marshstalker from your graveyard to the battlefield tapped and attacking.