Mad-Cackle Gnoll

Haste
Whenever you cast an instant or sorcery spell,
Mad-Cackle Gnoll gains +2/+0 until the end of
turn.
Shimmer {r}: You may cast Mad-Cackle Gnoll
for its Shimmer cost. If you do, Mad-Cackle
Gnoll becomes an Illusion in addition to its other creature types, and has "When this creature
becomes the target of a spell, sacrifice it."