Exhaust

MTG Mechanic

Exhaust abilities can have all sorts of effects. Not all of them involve +1/+1 counters, and a few of them aren't even on creatures! They usually have an easy way to remember that they've been activated, though, whether that's putting a counter on the permanent with the ability or creating a tricked-out token. If a permanent with an exhaust ability that's already been activated leaves the battlefield and then returns, it's a new object with a new instance of its exhaust ability. That exhaust ability can be activated.