Flying
When this creature enters, exile it unless you sacrifice another creature.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
Mana cost
2
B
B
Mana value
4
Printings
From
$0.29
EDHREC rank
#21289
Buy
Formats
Modern
Legal
Legacy
Legal
Vintage
Legal
Commander
Legal
Rulings
1 May 2012
Demonlord of Ashmouth's "enters" ability will trigger no matter how it entered, including because of its undying ability.
1 May 2012
You don't have to sacrifice another creature, even if you control one. You may choose to exile Demonlord of Ashmouth.