Guppy

As an additional cost to cast Guppy, sacrifice an artifact called "Black Cat, "Guppy's Colar",
"Guppy's Paw", "Guppy's Head", "Dead Cat",
"Guppy's Hair Ball", "Guppy's Eye" or
"Guppy's Tail". Enchant a creature you control.
It is now a cat in addition to it's other creature
types. It gains flying and "Whenever this creature
deals damage to any target, create a 1/1 black fly creature token with flying."