Skittering Skirge
Creature — Phyrexian Imp
Flying
When you cast a creature spell, sacrifice this creature.
The imps' warbling cries echo through Phyrexia's towers like those of mourning doves in a cathedral.
Ron Spencer
Rulings
A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.
(wotc • 2008-04-01)
The triggered ability triggers when the creature spell is cast, and it is put on the stack before any responses can be cast or activated. This ability will resolve before that creature enters.
(wotc • 2004-10-04)
Rulings
A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.
(wotc • 2008-04-01)
The triggered ability triggers when the creature spell is cast, and it is put on the stack before any responses can be cast or activated. This ability will resolve before that creature enters.
(wotc • 2004-10-04)