Ashling the Pilgrim is a 1/1 Elemental Shaman for 1R from Lorwyn. Personally, I think that Ashling is a little under-powered for a commander, but she can get big pretty fast, though you can only increase her power by +2/+2 per turn before she sacrifices her self to blow up and deal 3 damage to each creature and player. Sadly it doesn’t trigger at the end of the turn, so you can’t go above the 3 counters to squeeze more damage out of it. Personally, I think she’s a better utility card than a commander.
However, when she reached Shadowmoor on her pilgrimage (despite the card being in Eventide), she became The Extinguisher:
Ashling is now a 4/4 for 2BB, reminiscent of the 3 +1/+1 counters when the original Ashling would have incinerated the board. Instead, whenever she deals combat, she sacrifices one of your opponent’s creatures, even getting rid of indestructible enemies. Personally, I find her to be a much better general than the original.